sounds like you had a pretty rough holiday. I'm sorry. I can't imagine what you went through after hearing what your daughter said. I do agree with jarhead tho. It's not you having a problem with her R with OM. It's about your D being subject to that. Just make it clear that you don't care what she does, but she needs to consider your D before she does it.
Good for you on getting all dressed up and showing her that you can GAL w/out her. She'll notice.
There could be 100's of reasons she would tell your D she's w/ OM, but don't try to assume which one. You never really know.
BTW. I'm in Orange County.
Take care and keep taking your daughter to church, with all the craziness going around, she'll need it as much as you do.