Put your pillow on the floor, for your head. We're gonna do some sit-ups.
Do them normally, but you're gonna cross your arms and place each hand over your tits as you do them. That'll remind you how much of a sissy you are.
Imagine her standing over you making you lick her cock every time you came up from a sit-up. That would motivate you, wouldn't it?!
20 sit-ups now!