Tony was drinking a cup of coffee as he waited for Peter, or Spiderman as he was forced to dress as in case someone saw him, to arrive at the lab. He was curious to see what the nanobots had done. Tony has set them to "enhance physical attribute" hoping they would finally give Peter some muscle and brawn. The doors to the lab whished open as Peter came in.
"Only ten minutes late today, Pete?" Tony said snidely.
"Good morning to you to, Mr. Stark," Peter chuckled. Tony looked Peter up and down, nothing looked changed at all. Wasn't his invention working for once?
"Noticed any changes? Your balls dropping or body hair? Oh wait, that's puberty.."
"No, nothing so far, Mr. Stark? Same old Spider-man.." he said and turned in place to show nothing had changed. But something had changed. Tony almost choked on his coffee when he saw Peter's backside. Or butt, more specifically. It wasn't too much bigger, but it had gone from average to a perky bubble butt. The tight fitting fabric did nothing to hide it either, clinging to it is round form like skin, even going a bit up his crack to really show off each cheek.
"Woah, anything wrong, Mr. Stark," Peter turned to face him and asked. Tony almost blushed and thought about it for a few seconds before answering.
"Oh, no nothing at all, Peter. I guess the nanobots didn't work after all, but just to be safe we'll let them work for a few more days. Meanwhile, I think you have science test in like 30 minutes."
"Oh, alright. Wait, how'd you know? Fine, see ya later, Mr. Stark!" he said in his friendly usual way and ran back out where he came from.
"Just let me know if any big changes happen okay?" he yelled after him as he watched Peter's cheeks bounce as he left. Swinging through New York towards his school, occasionally scratching the bottom of his suit which felt extra tight and itchy today, Peter thought about what he wanted to do today