The terrifying thing about becoming a parent is that you get what you get.

My dad likes to joke that my sister and I (we're the eldest) are the best sons a guy could ask for, because he used to be so caught up with wanting a son to go hiking and camping and fishing with, stuff like that. But then my mom got pregnant with us right off the bat and took a few years to want to go through another pregnancy, so my dad just rolled with raising us. My sister is more of a traditionally feminine woman than I am and always has been, but we both love outdoors stuff (and always have), I love fixing cars and doing various home improvement projects with my dad, etc. We do have brothers but funnily enough, none of them really care for traditionally masculine stuff, or at least not the same traditionally masculine stuff my dad does.

I think it's common for new parents to project a lot of stuff onto their unborn and/or hypothetical children just based on gender, but kids are going to be who they're going to be. I also think that a lot of parents, like my dad, do let go of those rigid ideas once they actually meet their kids. The only ones I've met who don't are pretty sexist. Hell, even my pretty sexist uncle who desperately wanted a boy absolutely fell in love with my four cousins, all of whom turned out to be girls. The youngest one got married two years ago and he even mentioned in his speech how he'd wanted a boy but was so happy he didn't get one because he loved his daughters so much. I hope the OP's husband comes around like that.

Agreed on not terminating one, too, even though I'm pretty extreme in my pro-choice beliefs. The OP doesn't sound on board with the idea at all, and terminating anyway is the way you get those long-lasting emotional problems that pro-life people like to claim is normal. And at 18 weeks (well, more, by the time they talk to the doctor and schedule the procedure and all that), the procedure is a lot riskier for mom and the other fetuses.