I followed your thread cod and was really shocked at the extent of his lies
I think yes, your sis probably is denial, and yes, I bet she is desperate to keep him. Desperate to keep her family together, desperate to hold onto the future she planned with him, and also desperate to hold onto the wonderful, fun, loving man that he can be. (Unless that's all an act too)
Definitely agree with the others and what you're doing in terms of supporting her. My 2 sisters want to KILL my H. They are livid. They somehow feel cheated by him too. They loved him to bits so are devastated for me, but also for themselves, and the loss of the BIL they thought they had.
It's hard for the relatives to put their own feelings aside. But it's the best thing for now.
Your sister has known about all of this for a long time hasn't she? My bet is that she's already had the angry stage. She's processed it all, weighed up her options, and still wants to be with him.
I do agree with you that he's being let off lightly. Most definitely.
But I understand too. My H had me feeling sorry for him when he was getting upset over ending it with OW too! But you're so desperate to save your marriage at that stage that you'll do whatever it takes.
It's horrendous for all involved. But seems like she's made up her mind and like you say, think long term and just support her as best you can.
It's not easy though. I know. My sisters are 18 and 19 so they don't have that same constraint and tell me exactly how it is every time I see them.
Including calling me a 'complete nutter' for considering giving H another chance! Fair enough comment I think!