Being a superhero sometimes means you forget about the small dangers in the world, like disease. For Peter, this means he loses May to natural causes, not something he could ever save her from.
Unknown to him, May left custody of Peter in the hands of Tony Stark, who, even though he wants kids, has no idea how to actually raise one. With a grieving superhero teenager on his hands, Tony is going to have to figure it out quick, if he wants Peter to ever be able to move on and be happy.
Peter Parker was alone.
He never expected to find a home, much less a family after May's passing. He made a promise to himself to never become attached to someone, lest he lose them. When he accidentally texts Tony Stark, will he be able to keep that promise?
Tony Stark was lonely.
He was a billionaire, philanthropist, ex-playboy, and a genius! But something was missing. Something important. Tony missed his family. He can't get back his old one, but every night he wonders 'is it possible to create a new one?'
I don't own Marvel or anything.
I don't expect anyone to read this so...