Quote: I think she's sick of feeling like mommy to me as well as the boys
Eeewwwwww! Having had an H, now XH who I felt I had to parent, let me tell you that this is one of the top 3 killers of lust and passion.
The great thing is you recognize it, acknowledge it, and address it
How about this? After a few more workouts, you thank her for kicking you butt -- you weren't traumatized, but you needed it and you are really feeling great. (The idea here is to reinforce that you want to hear from her, even if it hurts in the moment it is OK -- you both benefit in the long run.)
