Tony/Steve Fic Hunt-Perceived Infidelity

[whitewave3791.livejournal.com]

Hey all.

Haven't been on here in a while, but I'm trying to find a certain story and I'm drawing a blank.  Hopefully someone will be able to help.

I'm looking for a specific Tony/Steve story.  I think they are married but it may just be a committed relationship.  Tony is in his workshop when he sees a news report of Steve with an unknown woman on his arm (there may have been kissing) at a party he and Tony were supposed to be at.  Tony is devastated and locks himself in the workshop.  Only, when Steve shows up he is completely confused since he was at SHIELD all day training and helping with the new recruits.  It couldn't have been him, yet there is the photo evidence.  I believe Pepper slaps Steve and Clint punches him the next morning?  They are trying to figure out what is going on when Thor drags Loki the shapeshifter into the kitchen.  Steve sees red and the story ends up with a reconciliation between Tony and Steve.  I remember a line where Steve tells Tony that is Steve ever does cheat, Tony is to dump his ass and Steve is proud of Tony for protecting himself by hiding from Steve.

Does anyone know this story?  I am almost positive it is from AO3 and that is is a recent story, but it may be older since I've been digging around on there recently.  Help!  I really want to re-read this, since I've been on a Steve-cheats-on-Tony kick today and I need a happy fluffy angst story to ameliorate some of the bitterness I've been reading and I want a story where Tony has a healthy reaction to Steve's infidelity, rather than immediately forgiving him.