How much danger 4 31 yr old, 280 lb woman to have a baby? Hubby thinks it's too dangerous, tells me I have to lose weight b4 we do that. Can't wait.

Not dangerous. It just may be difficult to conceive as being obese leads to infertility. By losing as little as 20 pounds you may become fertile and get pregnant faster.
He is right.. Obesity increases just about every risk factor for pregnancy complications.