Annoying husband

My husband said the reason why he don't want to have a kid is because he don't want me to weigh as much as he does (240lbs) after I have the baby. I told to stop playing and he promised me that he's serious (we take promises very serious in our relationship)...I'm only 177.8 and 5'7..I have a lil Pugh in my tummy and the rest is just butt and tights I don't consider myself fat well not my whole body I'm just fat in the right places. But he's sooooo childish idk why I married him.