Would you consider eating dinner without him and not letting him eat the food? Instead, mention what you had so he knows you are still cooking the new exotic dishes. I would do this for a full 180 when you are ready for plan B. My only other suggestions for the 180 are let him get the tiniest glimpse of you looking all hot and sexy, but then leave and go dark, making him wonder where you are and miss you (and the cooking!). I bet that house is cold and lonely, even with baby, without you in it. If you must be home, then arrange for a girlfriend to call you and hole yourself up in your bedroom and chat quietly - again, he should wonder who you are talking to.
It seems obvious he misses his old life with you, but I think that is called "cake eating" regardless - he still gets the OW while he has you at home available to feed him and give him a piece of that life. He hasn't had to give it up yet.
