Well, that was quite an update! It seems that... you're human! Don't feel bad. Everything you've describe is perfectly natural given the situation and all you've put up with.
NQ, you're human too, it seems!
You both miss the companionship, and when someone gives you attention it feels great, but you value the M you made a commitment to - and the contrast with how the MLC twins are treating it is bound to cause some internal conflict. You both put your family first and make sure your kids are a priority in all of this.
I get might frustrated with my W as well - although she's mostly slipped back into her old ways - most of the new habits she picked up don't seem to have stuck. Let's hope that goes for new Rs as well!
Now that I've stated the obvious... ;-) I'm sure you both could get all the attention you want from the guys, so you've shown remarkable restraint.
Those darn MLC twins should realize how lucky they are and how well they had it.
