OP sounds like a great idea, brownie points ahoy! I could cancel for two months and spend the money on the missus with the added Christmas good will of 'You know that game you're always complaining about me playing? Well, not only am I stopping it for two months but the money I'm saving I'm spending on you too! Merry Christmas!'

Only slight drawback is, give an inch take a mile, she may decide that she likes the house to be a WoW-free zone and insist on the other 10 months too