So H's birthday is coming up in a few weeks. It's a milestone birthday for him. He casually told me he didn't want a surprise party, I wasn't planning one. I did have thoughts of doing something special awhile ago, but I reminded myself that 1. it's a form of pursuit 2. he is still having an affair 3. he's not worth of it at the time b/c of his choices.
Last weekend, his sisters mentioned throwing him a surprise party. I told them that he told me not to throw him one. They said that they would be throwing him the party, not me, so I would not get in trouble with him. They don't know about his affair...no one knows but me, him, our kids and the OW (and you guys).

How do I get out of this? Or do I just go long and not worry since either way he will be mad? I can't just not show up because then questions will be asked and I'm sure I have to make sure to get him wherever they want him. Plus I'll have the kids.

Even though I won't be helping at all, H will blame me for it because I knew what they were doing.