Not So Itsy Bitsy

Male reader x Peter Parker.

(Y/N) is the son of Tony Stark, and your boyfriend is Peter Parker, aka Spider-Man. (Y/N) is really into baking and cooking, and Peter is your eager taste tester, who never disappoints and eats every last crumb you give him. However, all of these sugary confections start to take a toll on the Spider's body, yet, you love it and can only hope Peter does too, because the damage done to his waistline, is irreversible.

* this is a weight gain story!