Hi Tx Mom, Well glad he got an apt. As you know my H got his own too, but we see that he spends 95% of the time going to OW's house. All smoke and mirrors.
I would have H watch the kids at your house. Since they are so small I think what is familiar will be easier on them. I know staying at his place might be difficult for you and maybe H does not want you to stay in "his space". Let us know his thoughts.
As far as the OW -- tough to say. It might be good for her to see the kids and really know what she is getting into, and this won't be a cake walk for her. It is responsibility, it is being grownup. Right now she has just the fun part. Wait till H has to break plans because the kids are sick or other family crisis. As with my H this A is new (well actually almost 5 months for my H) and 3 months for yours. So it is still exciting. We have to wait it out.
Holidays? Tough call. If H wants to spend the time with his family maybe I would let him to both Thanksgiving and Christmas. But I might be too softhearted. A reality check could be that not having his family might be a wake up call. A tough one to decide.
Take care and be strong. I think it will be a long haul. Will keep praying for our families everyday.
Me 53 H 50 D16, D29 M 22 years bomb 7/08 INH - alien pod replaces H 8/08 - OW (direct report), I work there also bomb II - H moves 10/1 expose ow 10/22 D to be final 9-09