There's an ongoing bet between the Avengers on whether or not Peter is worthy. Tony, Steve, Thor, and Natasha think so, but the others don't. There hasn't been an opportunity for Peter to try and lift Thor's hammer, until Tony has the brilliant idea of leaving Mjolnir on Peter's bed.
It is 1am and Peter is now getting back from patrol. As soon as Peter gets through his window, he strips off his Spiderman suit and goes to crawl in bed. Peter is stopped by Mjolnir laying on his bed. Without much thought Peter simply picks up the hammer and places it on his desk.
Meanwhile in the living room, the Avengers were watching the security footage of Peter's room. They all watch as Peter picks up Mjolnir.
"I knew my son was worthy." Tony smirked as he was handed a portion of the betting pool.
AN: I apologize for having this out so late and it being so short. School lately has been hectic and I haven't had much time to write. ~Ariel
P.S. MERRY CHRISTMAS! Happy Hanukkah! I hope everyone has a happy holiday!