My future mother-in-law wants to add 30 more guests after we have sent out the invites. Can I ask her to pay for them?
If the number of guests have already been agreed upon and the invites are in the mail, she is asking too much, not you. Have your fiance explain what your budget situation is and tell her she’s welcome to add the new guest, as long as she’s willing to help cover the costs. Coming from her son, it might seem like less of a threat.

