Smut. TonyxLoki and things get a little to hot for the boys at Tonys 21st birthday and Loki seems to be the perfect gift.

<FrostIron> Steve overhears Tony and Loki in Tony's lab one night and is rather scarred for life.

Loki appears at Stark Tower while the Avengers are eatting dinner. Loki is under the table and is between Tonys legs. Tony can hardly control himself