I am married also, and I have a 2 year old son running through the house terrorizing everything.
So, yeah I only seriously play after everyone has gone to bed, so I'll have no interuptions. I play durring the day sometimes too, but I can never party or do anything too serious because I often have to get up from my desk and run off yelling, "Steve! Put that down! No!!!"
My wife pretends to be interested in the stories I tell her about the game. Which is very nice of her.
Me: "OMG last night we ran through Kuftal Tunnel, and Guivere was up, and then this one dude got aggro, so we all freaked and ran like hell..."
Wife: "Huh? Oh oh, sounds great...."
Me: "Yeah...oh, my fishing skill hit level 43 yesterday."
Wife: "Fishing? You stay up til 3am everynight fishing in a video game??"
Me: "...well not everynight...sometimes get a party or something..."
Wife: "You've been playing that game for 2 years now...haven't you beaten it yet??"
Me: "..."
But she's a good sport, and I love her dearly. I have lots of patience, so I don't mind only playing a few hours a night.