Loki and Tony are held in room room, Thor and Steve in another. One of the kidnappers takes Stark's Arc Reactor and Loki tries to keep him alive with magic, but the bad guys keep breaking them up so Loki realises that if he pretends to turn on Tony then he'll be able to stay close enough to keep him alive. So he pretends to rape Tony. Meanwhile in the other room Steve and Thor are shown on a TV Loki 'raping' Tony. Thor (I think, but it may be Steve) wants to smash the TV in anger but Steve tells him no, this is their only means of surveillance. They are furious and when they finally escape they are about to kill Loki, luckily Tony sets them straight just in time.
I really hope somebody knows this cause I really want to read it again. Thanks in advance :)