Nah deffo don't reckon Casey cheated, he probably got sick of her bullshit and pouring her wee down the drain and told her to piss off, and she's acting like she's not arsed hes jibbed her. When really off camera she's probably going mental and ringing him 90 times leaving him voicemails saying "pleeease Caaaasey. Ill send Rox me mams for the weekend and you can come with me on the 3 holidays av beeeeweked. Caaaasey did you know I've got a bladda condition??"