Question in title. Already have passive dread going by being in very good shape myself but it’s just not working. What to do? Any advice?

We have a very active sex life, fucking several times a week. And it’s not like she’s a whale. I’d just like her to get into a little better shape and build some definition. Like lose 10 pounds and keep it off.

Not sure what I’m doing wrong here. I’m in the gym 5 days a week and make it a point to eat healthy. She knows this. Should I start laying off compliments and withhold sex until she starts making changes?