deadcrush
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An Occasional Matter of Family by dare-to-do-our-duty reviews
In which Tony Stark is a cousin of Sam and Dean Winchester and they meet up (along with the Avengers, Pepper, and who knows who else) in between saving the world. Several times.
Crossover - Supernatural & Avengers - Rated: K - English - Family/Drama - Chapters: 29 - Words: 206,364 - Reviews: 421 - Favs: 1,006 - Follows: 907 - Updated: 1/14/2018 - Published: 1/12/2016 - Sam W., Dean W., Iron Man/Tony S., Pepper P. - Complete