5 Times Tony Notices Peter's Age Play Habits +1 Time He Discovers Peter's a Little

Tony glances up at the boy from where he is working on a new type of nano tech for his Iron Man suit. Peter is sitting criss cross applesauce on the floor. One elbow is on his left knee, his head resting lazily in his palm, and the other hand is rolling a ragged tennis ball towards DUM-E. The robot is playfully rolling the ball back and every time it gently hit his knee the boy would giggle softly and sweetly. Peter had his middle two fingers resting in his mouth and when he giggled spit would drip from the fingers onto his lap. ORTony starts picking up on Peter's little habits (sucking his thumb, having accidents, taking naps, sleeping with a stuffed animal, etc.) and he is both confused and wants to show affection to Peter.

This could hypothetically be read alone with the knowledge that Clint and Peter have a non sexual age play dynamic that Tony is about to discover, but reading the other fics first may help !!