I would stay. Pretend you are asleep if you have to when she gets home. Its 12am.
You're a man, you're watching your kids. It's not about whether or not she likes it. You're a man watching your kids and you're not going to be some whipped puppy that goes home at 12am because she feels uncomfortable.
Me: 42 W: 32 Married 7 years together 8.5 S1: 7 S2:7 Bomb #1: 09-16-13 Recon #1: 11/13 A discovered 04-03-2014 W filed D 05-19-14 but never served me I filed D 12-02-2014 S 05-31-14 Divorced 5-19-16
I third that! Good decision on your part Oad. Hope it went well. And then in the morning or the following day, i would not ask how her trip went but just converse as if it were just another day. If she wants to share details, she will.