Wife wont admit to affair and its driving me nuts!

[Morbo]

Vanilla.. No L advice yet.
We're doing pretty well with 50/50ish co-parenting and I cant see that changing anytime soon.

So, W came over this morning, she kinda guilted me a lot yesterday that we should spend a little time together for the kids opening our presents for each other.

She's definitely noticing that I've 180d the past few weeks, and have stopped completely the whole pursuer, meek husband role. She doesnt like it, thats for sure and she keeps asking what I'm up to?
Anyway, house looked great, I had worked out, looked good too, lol and I think she was really impressed esp with all the new stuff I've done for the kids in their room. She loved her presents, they were thoughtful. All the while, we sat, had coffee but I'm definitely distant but pleasnt and I never made any effort at all to hug her or anything.

I mentioned I was going to start going to a gym and I had a couple of other things planned in the New Year. Tears started, the usual "Why werent you like this when we were married?". Then she said, "Everything is working out for you, your new job, gym, all your new friends, its probably the best thing that ever happened to you!!" . I said "Yes, its great!"
Normally I would have consoled her, said I'm sorry for everything and that I wanted her back.
This time I kept it honest and didnt fall for the bait.

I'm proud of myself.
We left on good terms, she kept asking for hugs as I wasnt really offering but she could feel my distance.
Then I asked her what she was doing the rest of the day , and Christmas. I didnt really get any concrete replies, except walking the dog, watching a movie and going for mimosas in the morning with a friend.
She could see that I didnt really believe her but I didnt push it.

Anyway, that was difficult but I'm slowly making that switch.

Now time to enjoy Christmas.

Have a great one, everyone, thank for all your help :-)