We would like to have 2. We have a 3.5 year old now and hoping to try for a second at the end of the year. I'll be 36 then, so that will be plenty for us. I could see if I had started having babies younger or we just had an unlimited amount of money to pay for them, wanting to have a 3rd. But after a second, we'll be ready to have a bit more of a normal life without all the exhaustion of having small children. With an almost 4 year old now, we're starting to be able to do things again that we haven't done in years, like have a night away or go out to dinner alone or get a full night's sleep. I think I can only go back to giving all that up and starting from the beginning one more time! Also, it's really about all we can afford to. I'd like to have the money to not struggle to afford nursery when I go back to work, for them to be able to do things that interest them, take classes, go on weekend trips, have family holidays, and I think any more than 2 would be a strain on us. My family lives overseas, so it's already really expensive to visit them, so my daughter doesn't see them much. I'd rather be able to do those sorts of things than have a 3rd, so we'll be happy with 2.