I'm sorry this is such a terrible day, and even worse for your daughters because they have been misled into thinking they were having a good day. I have no idea what to do. I was lucky and was able to short-circuit my husband's affair and piece the marriage back together. But as for the pictures, I would ask the girls tomorrow, or the next day if they want to change things. Maybe move some pictures around, or go buy some new ones together. The house will be for the three of you, so I would get them to help me make the changes.
