AllHallows has a very good point, you need to ensure that you have the right model for your DC especially sons.
I have been SAHM and worked PT at various times since DS was born. So at times I have done more housework than DH, and we've always joked about me being the laundry fairy. But once DS was old enough he was responsible for putting his dirty clothes in the laundry basket and putting his clean clothes away. He has also seen DH wield an iron. DH is also, by far, a better cook than me, so he will cook meals even when I have been a SAHM, as he enjoys it.
I was out last night at a meeting, but it was a community thing I volunteer for, so not a demanding job (although seems to take up more hours and responsibility as my previous part-time role did). DH did not complain that he was responsible for dinner as I was out.
Interestingly in our circle of friends, if we go to someone's house for dinner, it is more than likely the men that cook.
It is hard when you are a SAHM to break the tradition of women's work, but there really is no excuse for men not to do their share when they are at home, especially when you have 4DC.
Do you ever get a chance for you time (hard if you have a baby)? Is there a chance you could go out for an afternoon and your DH has to muddle through and sort out kids' tea? Might be rubbish beige food but at least it would be a start.