After a shaky start in my 20s when I kept getting made redundant, I retrained to a very high level and am now in a secure, well-earning profession. I am also the breadwinner. I am motivated my money, by doing well and by having a nice lifestyle! 
I am TTC and plan to have 9-12 months' maternity leave and then return to work full-time (5 days M-F). I have every intention of continuing to climb the career ladder as a mother.
However, without exception, it seems everyone I talk to (family, in-laws, friends, even colleagues!) says "oh you'll feel differently after you have your baby! You'll only want to return to work 3 or 4 days a week!"
But as well as being motivated by all of the above, I feel I have worked and trained bloody hard to get to where I am now and I am damned if I am going to cut back to part time just because I'm a mother!
So AIBU? Is everyone being a bit patronising (matronising?!)?