Before any wedding plans started my fiance asked his mom if she would contribute to the wedding. She said that she would contribute 4,000 dollars. Now that the time has come to pay she says she doesnt have it. We were planning on her money and had we known at the beginning we wouldnt have added it into paying for preperations. Also, she continues to add to the guest list! Everywhere we go she adds new people that arent even close to her. I feel as though they are taking advantage of the situation. I feel upset because my parents and me and my fiance are the ones footing the bill. I already put their names on the invites...I am thinking bout taking them off and putting it on there as "son of...." Any suggestions?
You could list their names as: son of, because they are not contributing. It is unfortunate that they didn't keep their word, but it is their prerogative to give or no. But, even if they were footing the entire bill, they do not invite. She can verbally invite anyone she wishes, but that doesn't mean they are really invited, as you make the list. Only invite those close to you.
Please don't accept a shower hosted by her (or your mother) as mothers shouldn't host. And, if she hosted and invited guests, all of those guests would have to be invited to your wedding.
Refer all problems with your future in-laws to your fiance. He should be the one to handle his parents.