I'm looking for a particular one shot. I know it's part of a series of one shots by the same author.
A girl gets a new boyfriend who is trying really hard to get to know her. All of a sudden the ex-boyfriend shows up and messes things up a little bit. I think he says something offensive about how she was "in bed." The couple ends up in either a train stop or a bus stop bench and they attempt to do "it," but if I remember correctly, he stops (probably saying something about "forcing yourself" to the girl). I don't remember the ending but I know its happy.

Any ideas?