FG, what did you say to her when she said you didn't trust her commitment to the kids? If you honestly do question her commitment to them, I don't think that's necessarily a bad thing to express to her.
The only thing I would caution against is putting the kids in the middle of this. I think it was Sandi on my thread who pointed out that I was doing similar. I've thought a lot about that and am consciously trying to not include my D in the conversations the W and I have around our MR. It's hard though bc we know just how detrimental our Ws actions are to their well being, so I completely understand.
I'd hold off on an apology if it were me. Maybe letting your W stew on your comments for awhile isn't necessarily a bad thing. Some vets may have a different opinion though. Regardless, hang in the FG!
Me39 M11 : T13 D9 BD 5/31/16 In House S until 6/21/17 Divorced 10/5/18