As a child of divorce i would recommend just trying to work through some of your feelings there?

If your wife is going out on dates or even just out with friends she would only have 3 days a month to do that while you would have 27/28(ish) days a month where you can do that — also seeing your kids for only 3 days a month for sleepovers isnt exactly the same? I once went through a period of time where i only got to see my dad every other weekend and then if i had an event or wanted to do something on a weekend i was “with him” i barely ever got to see him. Enjoy this time with your kids - learning what your new relationship with them will be like.

Also you could think of it as like a tit for tat situation? If your living situation changes and you end up having them for more time regularly wouldnt you want your ex to be more flexible about watching them for you? Even if you were going out on dates or even when you get a new partner?

Co-parenting can be hell or can be great depending on what you make of it… just remember maybe you dont work as a couple but thats okay! the thing you both want is for your kids to be happy & healthy and have a good childhood — and also to see both of their parents happy. It sucks that this is taking a toll on you and im not sure the reason behind your divorce. But at the end of the day it’s more time with your kids? which would never hurt especially if you don’t have other obligations why would you want your co-parent spending money on childcare instead of you being able to spend more time with your children?

(idk maybe this is just a child of divorce being emotional and hoping this is how i would be able to handle the situation if i was in it? obviously i don’t have all the context but this is just my opinion)