General

I would let it be. My boyfriend didn’t push it and over the years he has really fattened me up. Had he pushed me I would have left him.

Sounds like you got lucky for now. When I did the same thing. I did not get lucky.

Let it sit. Let her come to you to talk about it. Don't push it. Maybe it never comes up again, who knows.

I hope it works out. However if she finds out you're on a fetish website and you didn't tell her and she knows you like bigger women and well, there are some here.

That might not go over so well. Tread carefully.

I agree with the others, let it sit ... in the specific. In the general, do make an extra effort to check in on how she is doing, and to do some activities that are very familiar and comforting to you both (be it a favorite day trip, Sunday brunch, taking a walk together, just going to get a coffee and people watch. Just some stuff that should have that comfortable 'this is a normal thing that he and I enjoy together' as a reminder of all the normal and good things in your relationship.