Sex and pregnancy, expectations

I’m 18 weeks and my bf expects for us to have sex everyday. Whenever, where ever, even in the car if it’ll take too long to drive home (30-35 minutes 🙄. ) I’ve explained I don’t want this, even explained that if I can’t meet his needs, he’s free to leave at anytime but he doesn’t. I’ve never ever denied sex, that’s not the issue, the issue is trying to meet his unrealistic expectations.

What would you do?