Husband has a lower sex drive but....

So my hubby can't keep up with me sexually. We've had this problem for the entire 6 years we've been together. We do have sex...I'd say 3 times a week, sometimes more but I crave more. He gets his feelings hurt if I want to masturbate in between sessions or use a toy of some sort. What can I do? I'm pregnant right now with our third and I'm even worse while pregnant. He gets his feelings hurt saying he doesn't satisfy me...but he does when we do have sex...I just want it more frequently.