If she was given the paperwork, told and KNOWS her moving deadline - you have to let it play out. But if I were you - I'd consult with my lawyer about "WHAT IF". In case she doesn't move out. I'm sure that serving her with a legal eviction notice might be very traumatic, especially since your daughter is living with you but maybe you need to let her know that you would't want to do that but that you WILL do it if it comes to that.
Your wife may very well be delusional and believe she either won't have to move (because you would not evict her) or she is just delaying the inevitable and is in total denial about how much work it takes to move. Some people are like that. They figure - why pack? When all my friends are here on moving day - we'll get it done somehow.
