Hopefully her honeymoon in Paris (as well as the other trip -Asia, Europe) is a kind of eye opener that she is young and should do things and experiment before settling down with kids. Also maybe she knows that financially they aren't ready for kids yet. I mean what is Ben doing for work now?
[Edit to add] didn't Jessa hate cooking or she was never really good at it? Maybe she just didn't like cooking for 20 plus people everyday.