I listened to the repeat, jess said that she met up with rob after she'd graduated, when he moved to London. He'd wanted her to go to his uni but didn't get the grades. So - she escaped his hooks for a couple of years, presumably rob realised he couldn't keep her isolated and controlled at a different uni. But then he comes back - london isn't exactly an obvious place for an agricultural bod. Presumably she had a social work job there before he moved them to the US. (Yes, the SWs clearly dont know about US visa regulations).
Any clue why they returned from Canada?