Every individual is so different, so is their sex drive after kids. Especially women who generally have emotions rule their sexual experience. Is there really a fail-proof way to have a genuine desire to hit the sack?

in my experience, the only fool-proof way to genuinely want to have sex is to rekindle the romance. it is very difficult for our bodies to react the same way after so many hormonal changes. but i would say try to reignite the spark. go out on dates, create that atmosphere in the house, give him your undivided attention when you can and demand the same from him too, dress up for yourself and for him, and do a lot of cuddle and hug and cozy things, that are not necessarily sexual, but are intimate nonetheless.