Oh my goodness. I guess I am just flabbergasted. Is she for real? She wants every family to pick a theme and come dressed up? That is kind of bothering me from the start, as is the vision of a child "feeling" his mother's S&M like costume... I have been to grown up halloween parties, and if that were the case, you expect this kind of thing and that is so different. My husband and I were Almond Joy and Mounds once, draw your own conclusions about who was who. That was fun, and there were those kinds of sort of inappropriate suggestive costumes, and if she can pull that off, more power to her.
Let me tell you my experience. We have a child with an October birthday and have had family Halloween birthday parties before. One year, a freind called me and asked if she should wear a costume too. I told her that I was not planning on it, but if she wanted to, she could, but that the dress up party was for the kids, and I did not expect the adults to dress, but the adults were all invited to come enjoy the cook out, relax, have a beer, and watch the kids have fun. She too was a very nice looking woman. She came dressed in an I dream of Jeanie costume, with her belly and cleavage in more than full (and very nice-she was well endowed and very attractive) display and the sides of the parachute pants cut up to you know where. She looked very, very, hot, and extreemly out of place under the circumstances. Her arriaval completely changed the feel of the party. The husband's were speechless and uncomfortable, and the other wives started to gather in corners to talk, and I was furious that the fun family party we had planned became so uncomfortable for everyone, everyone, that is, except for the kids who had no idea what was going on and continued to play the games and have the fun we had planned for them. This woman's husband was unexplanably absent, which spoke volumes.
Your friend should really think about this. The children will think it is really cool and won't notice a thing that is going on. But the adults sure will, and most of them will not know where to look, what to say, and how to avoid talking about the elephant at the party.
She should consider putting together something that is more appropriate for a family event. A short sleved black tee with black bike shorts and the cat woman head dress and a cape would still say cat woman without saying "look at me and guess what I like to do in bed." Because, I can tell you from experience, that will be the topic of the little gatherings of Mom's in the all the corners...who knows, the men may be high fiving her husband, but for all the wrong reasons. She should just enjoy the party. or find something more appropriate to wear.
BTW, which one is her husband?
M.