Let's Forget

Steve Rogers makes a mistake. After the rumors of Tony having an affair reach him he gets drunk and wakes up naked besides a familiar face. None other than his ex lover Peggy Carter.
But to Peggy, it was more than just a night stand.

Steve decides to break things off with Tony but realizes his huge mistake a bit too late.

After a miserable year, Steve suffers from a head injury resulting in temporary memory loss. He wakes up with the mentality of still being with Tony and pushes Peggy away.

In order to help with the recovery, Tony is asked to step in and help.
Does Tony still have feelings?
Can Steve win him back?

Please read I suck at summaries :)