>>76825826 (OP)
I want to fuck my wife's ass.
She knows this, but she's not interested. She's also lost her libido with age, stress, etc, and the kids are constantly cock blocking us anyway. So when we do fuck, it's not very often, it's typically not conducive to extended playtime, and it's hard to make real progress on pushing her boundaries. Hell, half the time when we do get it on, she just wants to starfish while I make both of us cum.
I play with her ass maybe 25% of the sexy-time, more than that and she gets annoyed, but that means weeks or even months could go by between ass-attempts. I've had fingers up there, a small vibrator, my tongue, honestly there's very little left except to get my dick in there, but the confluence of the planets it would take for that to happen with the way things are now...
I have convinced myself that if I get fit, either her libido will return or she'll get jealous of me catching mires, or some mixture of the two, and she'll be more receptive to my pushing boundaries. She might make more of an effort to keep me pleased at all - that would sure be nice. I wouldn't mind her feeling a little more pressure to get her own self in shape, too.
I am well aware that this is stupid, she should give up the butthole just because it's me asking, and my getting fit won't address other issues in the relationship that have led to her slacking off in bed. What do I have to lose by getting fit, though? And honestly, I want to be able to look her in the eye and say, well at least I'm trying.