1. Waiting;

You ask, "How do I sit down and ask my mother about something I'm not even supposed to know?"... You don't, you unmitigated moron! But then I wouldn't expect you to understand that since you evidently don't even understand that you don't go through your mother's private papers without her knowledge and consent or that you and your sisters have no rights at all in this matter. I almost hope you do confront your mother and demand answers. Maybe then she'll put your ass out on the street where it belongs. I am not surprised you are still living at home with Mommy though... a person with so little respect for boundaries as you display is unlikely to have an easy time finding housemates or partners who will tolerate them and family, as Robert Frost reflected, has to take you in. At 21. however, you are old enough to kick out of the nest and should you decide to continue flapping your jaw about this matter you will give her every legitimate excuse in the world to do just exactly that.

Wary;

You ask, "what should I do in the meantime?"... You should mind your own fucking business is what you should do. Unless she is schizophrenic (and I mean certifiable by a professional) you have no standing whatever to interfere. Even if she actually is romantically involved with gramps there, it is none of your affair and it is perfectly legal - whether most folks find it a bit creepy or not. Spend time with your sister if you (and she) like. Be concerned for her well being if you must. But do not interfere in her choices as she explores the world and becomes the woman she will be. It ain't your place to judge. It ain't your place to condemn. And it sure as hell ain't your place to interfere.

3. Separate;

Oh for Pete's sake... Stop whining, grow some balls and tell anyone stupid enough to comment on your choices and decisions regarding child-rearing to fuck off and die. This is such a non-issue for most people... You are pathetic.

4. Wing;

I laughed so hard tears leaked from my eyes. If you really need Prudie - or anyone else - to tell you how to handle this situation you kind of deserve to get shit on... and you will get shit on - and not just by the birds.

My God, you people are strange...