Question about family

Hello everyone.. I have a question and I would like some opinions.. Me and my husband are expecting our 3rd and 4th child together (We will have 7 total)..I would like to know how many children is considered enough? I'm considering getting my tubes tied after my twins are born but my husband says he wants more when the kids get older. So I would like to hear what other women have to say before I make a decision ..Would anyone like to tell me how many kids they consider too many?