Ex initiating contact, do I need to know the story first?

I think she cheated. She never said she did but I asked her and her response said I'm sorry. We have been broken up for a couple weeks with no contact. Talked for a little while the other night and now she wants to meet up. I would like to be amicable with her. If she wants me to move past this and either be friends or setup the stage for an extended break and then try again, I need to know who it was with right?

Ex initiating contact, do I need to know the story first?
Post Opinion