Need advice for a WW who left Part 3

[dwh15]

So WW took S16 out to dinner and now the rest of the group is at her place having cake & ice cream. Just me home alone for next couple hours. I hate that this is how it's going to be on special events now. The kids either being with me, or with mom. Not a complete family. I'm not looking forward to the holidays this year at all. How do people get through that first Thanksgiving and Christmas living like this? I'm sure we'll work out a schedule but I dread the thought of possibly being w/o my kids on Christmas day.

Had a close call earlier, and almost lost it with WW via TM. I offered to throw my bday gift for S16 in with hers, and just say the whole things was from Mom & Dad. She agreed, thought it was a good idea, but then at the last minute threw in the fact that OM had contributed $20 and she wanted his name on the bday card too. I initially agreed for THIS time only, and replied I didn't want that to be the expectation every time we gave the kids gifts. No reply from WW. Then I started thinking about it and getting angry. Was about ready to send another TM saying forget the whole thing, I would buy my gifts, and she could buy hers with OM, but as I picked up my phone, saw she had replied Don't worry, he's more of a 1-gift kind of guy. I had specifically mentioned Xmas earlier so I'm sure that's what she was talking about. So instead, I just said OK. I want to be fair and not have the kids always thinking it's a competition between us, but I don't wanna see the 3 of us on the same card very often.

So crisis averted i suppose. It took some effort to bite my tongue about having OM on the bday card today, but I wanted it to be a happy occasion for S16 and WW, so starting up an argument right in the middle of their dinner would not have been a positive or mature thing to do. I like to think I was being the bigger person, but it was a stretch. I hope she doesn't keep pushing that agenda of putting OM on equal ground with the 2 actual parents, or I will have a major issue.