DEAR ABBY: I have a co-worker I'll call "Gloria" who invades a very personal place in my life. I don't know what to say to her without offending her, so I'm seeking your help.

My son and daughter-in-law live in a large city in a nearby state. Gloria's son and his wife happen to live in the same city, and she visits them about three times a year. When she heard that my son was moving there, she became very excited at the idea of the two of us riding together periodically to see our respective kids.

My son is a very private person and is involved in starting up a new business. He had plainly told me and my husband -- and all of the other relatives -- that we can visit only when an invitation is extended. That message was pretty clear to me and my husband, and we have honored his wishes.

Gloria, with whom I have worked for years, is constantly after me about going to visit our sons. "Any invitations yet?" she's always asking loudly.

When I tell her "No," she bellows, "Well, I think that's preposterous!" Then she goes on to spout her opinion of my son. If I did this to her, World War III would erupt right there in the office.

Gloria has never even met my son, yet she has endless opinions about him. This is really rubbing me the wrong way.

This woman fails to recognize that this is a touchy issue with me and doesn't get the hint. I have tried, "Well, that's a very personal question," to no avail. What can I politely say to get her to back off without causing strain in the office? -- KAY IN THE WESTERN HEMISPHERE

DEAR KAY: The problem with dropping "hints" to insensitive people is they usually don't take the hint. And you are compounding the problem by not addressing it directly.

If you want Gloria to stop her obnoxious behavior, have a chat with her in private. Tell her that you do not have the same "open-door" policy in your family that she seems to, and her questions and opinions about your son are making you uncomfortable. Tell her she should go ahead and see her son on her own and forget about you.

When you do receive an invitation to visit your son and daughter-in-law, do not utter a word about it to this woman, or she will start up again.

DEAR ABBY: I'm 13 years old, and -- I know this sounds kind of stupid -- I was cleaning out my fish tank and accidentally poured one of my fish down the sink. Now I'm feeling extremely guilty. Can you give me any advice on how to feel less guilty? -- MISSING MY FISH IN BELLINGHAM, WASH.

DEAR MISSING: If it makes you feel any less guilty, I am sure you are not the only fish owner this has happened to. To lessen your guilt, say a farewell prayer to your fish over the drain, then make a vow to be more careful in the future. Also, from now on, transfer your fish to another container when you're cleaning the tank.

DEAR READERS: Daylight-saving time ends at 2:00 Sunday morning, so don't forget to turn your clocks back one hour tonight when you go to bed.

What teens need to know about sex, drugs, AIDS and getting along with peers and parents is in "What Every Teen Should Know." To order, send a business-sized, self-addressed envelope, plus check or money order for $6 (U.S. funds) to: Dear Abby -- Teen Booklet, P.O. Box 447, Mount Morris, IL 61054-0447. (Postage is included in the price.)

DEAR ABBY: Five years ago, prior to my grandmother's death, she gave my brothers and me her summer home. When we all went to see the place, we found an overgrown lot with a house in complete disrepair.

My brothers and their families wanted nothing to do with restoring it. They said they had neither the time nor the money to put into repairs, and "camping wasn't their thing." We all knew the only value in the place was the land, so we had a real estate company give us an appraisal. My husband and I decided we did want to rebuild the house, so we paid my brothers the full value of the property.

Five years and thousands of dollars later, the house has been rebuilt from the frame up. And now, here's the problem: My brothers and their wives say it is the "family" summer home and are demanding keys so they can come up and stay anytime. I had planned all along to hold family picnics and such, but not give out keys to the place.

My brothers are furious with me, and so is my mother. They say I'm "greedy" and don't know how to share. But Abby, we paid them off. We did all the work, and we pay all the bills each month, not to mention the taxes. The house is in my name only.

Now I wish Grandma had donated the land to the state park and kept us out of it. I know she wanted it to stay in the family, and so did I, but I don't think my family is being fair.

Grandma was also a hard worker, and she wasn't the type to let people walk all over her. Should I stick to my guns and welcome them to visit when we're here, or just sell the place (which would break my heart) and forget this ever happened? -- SORRY, NO VACANCY, IN THE U.S.A.

DEAR NO VACANCY: Selling the property wouldn't fix your problem because your relatives would then resent you for having done so. Instead, take a page out of your grandmother's book, thicken your skin, and -- as you put it -- stick to your guns.

You paid for the property fair and square, and your brothers willingly let it go. By inviting your relatives to enjoy it with you, you are being more than generous. Please don't allow yourself to be emotionally blackmailed into submission.

DEAR ABBY: I'm a freshman in high school. Today an upperclassman paid me $5 to do his homework. I did it on the condition that he pay me up front. The deal worked out OK -- I got my money and he got his work. (I know it was wrong, and I'll never do it again.)

Now I'm feeling guilty. I'm worried that my handwriting will be recognized, and I'll never be trusted again. Should I talk to my school counselor about it, and will I be turned in? I'm not sure if I should give myself up or just hope for the best. Please help. -- GUILT-RIDDEN IN NORFOLK, VA.

DEAR GUILT-RIDDEN: If the upperclassman is as lazy as he appears to be, his teacher won't be fooled by his sudden improvement, and he will only fall further behind than he already is. I don't think it's necessary to turn yourself in. Return the money you were given and tell the person who hired you that you won't ever do his work for him again.

Abby shares more than 100 of her favorite recipes in two booklets: "Abby's Favorite Recipes" and "More Favorite Recipes by Dear Abby." Send a business-size, self-addressed envelope, plus check or money order for $12 (U.S. funds)

to: Dear Abby -- Cookbooklet Set, P.O. Box 447, Mount Morris, IL 61054-0447. (Postage is included in price.)

DEAR ABBY: I have a serious problem. Several months ago, my 15-year-old granddaughter, "Brittany," brought a girlfriend to my home explaining that "Megan's" mother was on drugs and Megan had no place to live. The mother was living between her car and an occasional motel room.

I felt sorry for the girl and allowed her, with her mother's permission, to stay with us. Megan's mother ultimately abandoned her. Megan wound up in police custody through no action of her own. I was called to retrieve her from the police station.

I was then asked to take the girl into my home, as there is a shortage of foster homes in our area and I had a foster license from years ago. Megan moved in, and I provided her with the essentials -- some clothing, a bedspread of her choosing, a yearbook from school, etc.

Suddenly, Brittany has decided that she "hates" Megan, and she is now begging me to get her out of my home. I agreed to foster this girl, and there is nowhere else for her to go.

Brittany is now avoiding us. She is no longer speaking to Megan and has stated that she'll let us have our "new granddaughter" -- she hates her. She's overly rude to Megan at family functions, excludes her from regular social occasions, and barely speaks to me or her grandfather anymore.

I'm not stupid. I know Brittany is jealous, although I have assured her that no one can ever take her place. She insists that I "get rid of" Megan -- and she doesn't care where she goes. My daughter just says, "Well, what did you expect?" and gives me no backup or support.

I don't want to put Megan into the "system," as she would go to a group home from here. However, I am very torn at obviously hurting my granddaughter. I don't know what to do. Please help me. -- PULLED IN TWO IN CALIFORNIA

DEAR PULLED IN TWO: Stay the course. Brittany may be 15, but she's acting like a 7-year-old. She wanted you to help her friend on HER terms -- but not too much. The rivalry she's exhibiting is uncalled for, and the fact that your daughter is not joining you in giving Brittany an attitude adjustment is puzzling and disappointing.

If your granddaughter wants to sulk, there's nothing you can do about it. Right now, there are more important things to consider than your granddaughter's spoiled behavior -- specifically, the welfare of a young girl who is in trouble through no fault of her own. Please continue to support her rather than allowing yourself to be manipulated by a child who clearly has no idea of what life is really about.

DEAR ABBY: I am a male in my 50s, fit, and wear an ankle-length (either dark or light blue) robe around the house when I'm not ready to get dressed. Neither is ratty, worn or in disrepair.

We live in a quiet, middle-class neighborhood. Abby, I sometimes go out and pick up the newspaper from the front lawn wearing my robe. My wife thinks this is inappropriate. Is it? -- COMFORTABLY LOUNGING IN FORT WORTH

DEAR COMFORTABLY LOUNGING: Not from my perspective. If this is all your wife can find to complain about, she's a lucky woman.

Good advice for everyone -- teens to seniors -- is in "The Anger in All of Us and How to Deal With It." To order, send a business-size, self-addressed envelope, plus check or money order for $6 (U.S. funds only) to: Dear Abby, Anger Booklet, P.O. Box 447, Mount Morris, IL 61054-0447. (Postage is included.)