SMG4: Meggy's Fitness Exercises

Mario and Meggy have been dating for weeks now and had a happy relationship together, but the Smol Bean had a feeling that the Italian plumber gained a too much weight and needed to eat better food, besides spaghetti and pizza.

And she was right, the red plumber almost died from a heart attack from eating too much spaghetti, Meggy was going to help The Italian plumber to burn out ALL those caries, before it turns into fat.

Meggy asked her boyfriend to join her excises routine to lose some weight, but Mario refused, the Smol Bean did not take any chances.
So she had to FORCE Mario to workout!

By using her "Secret Weapon" to convince the Italian plumber to join her excises routine.

I wonder why does Meggy want to workout with Mario? Mario is fat and looks like he needed to lose weight, but not just for his health, the orange haired girl had another reason why. Why could she have Mario workout with her?