Well gee lets see
Your husband likes big breasts
He thinks yours would look better if they were bigger
Bigger breasts would "look right" on your body.
You think you would like to have bigger breasts so it is not just to "please him"
As long as you are over 18 and even if you were/are not he his your husband so he gets more say on the legal front than your parents, unless you are looking for them to pay for them or they otherwise support you then I don't see how they could have "a vote"
Plenty of web sites with info on PS in general and breast enlargement in particular and most DR.s have web sites these days and there are sites where DR.s are reviewed
Google is your friend.