i love that and maybe it didn't really cross their minds beforehand but something clicked in at the same time. my first thought was her cheating, especially with her being in college and likely going out of her way to be at a lot of parties to make friends and thus getting drunk and making a mistake that she had to own up to. she probably would have been apologetic but also defensive at the time about if he was around!! which lead to a the blow out. but with a bit of time, she would have given him a more sincere apology and been happy to get back to friendly terms.