A MURDER can really screw up a relationship. Just ask onetime kinky lovebirds Amanda Knox and Raffaele Sollecito whose torrid sex games may have led to murder. The couple were recently (and dubiously) acquitted of murdering Knox's British roommate during a botched sex game. But now, Mama Mia!, the Italian Stallion says they'rea quitsa.He said: "It's all over between us. I still have a great affection towards her but
