Linda, My mil also said she doesn't understand how I can want to try and forgive him and still try to make it work. I think mil is hurt that her son could do something like that. I think somehow they think it is a reflection on them. I told her I married him for better or worse and this is the "worse" part.
I think someone on another thread said something like when they are living with OW they see what they are really like and the grass may not be as green as they thought.
I think your h may see that with RT. Not only her but the surroundings there. In one month RT's true colors are bound to show and hopefully he'll be anxiously waiting for his return flight to see you. I have a feeling she's going to be real pushy.
M 48 H 50 M 25 T 27 D 20,18,15 6/11 H filed 3/12 H dropped 4/12 H moved out