Shouldn't there be either a "C" for "cooking" or an "S" for "sammich maker" in that title?
Maybe you should turn the tables
Let her know you don't need her for it by putting on some pr0n and giving it a crank in the lounge room after dinner.... or better still, when you are both in bed getting ready for sleep.
With a bit of luck, that daily display of reverse psychology should net you the return you are after.
If it doesn't, it least you'll sleep well
*** iamhe77 is not a qualified nor practicing psychologist/relationship councillor. The above advice is purely "tongue-in-cheek" and should only be acted upon if your spouse has a decent sense of humour, gets excited watching you or is the jealous type. Actions not to be carried out prior to confirmation of children being asleep ***