Hot Friends, Risky Lovers 4 - Hot Friends, Risky Lovers, #4

William is a slutty cheat, and he feels just awful about it.  (Not awful enough not to do it in the first place, though.)  Is it too late to have second thoughts, when he's already on a road-trip with Mark, his old buddy, his long-standing crush?  And will Alan take him back, anyhow?