TV Characters Who Slept With Their Best Friend’s Guy — or Girl! (PHOTOS)

Not only did Glee’s Puck (Mark Salling) hook up with the hot cheerleader girlfriend of his best friend and football teammate Finn (Cory Monteith), but he ended up getting her pregnant. Oddly enough, Quinn (Dianna Agron) was able to convince Finn that he was the father (sperm can travel really well through the water in hot tubs, didn’t you know?) — but that excuse only held up for so long before the real truth of the matter came out.