My ex left me in a foreign country for someone who she'd been seeing whilst I was working 12hr shifts. Got fucking pregnant by the dude, and then asked me to, not only forgive her, but to marry her and bring up his child.
Oh, she asked me this just after fucking me.
And of course she was still with him the entire time.
Beat that bullshit.
Edit outcome = told her to not to let the door hit her on the way out.
Edit 2 cheers for the replies. Just for added shitness, when we split, I was living at her place and I never saw my belongings again. She even took my rucksack (after she dumped my shit out) which I was using seeing as we was backpacking around Asia and the Middle East at the time.