Turn off the computer or time him be like this weeks you have played 18 hours of games or what not. My husband plays games too but not as much as he used to before we had our son now he makes sure everything is taken care of first. Maybe after the baby comes he will stop playing so much
Then I get called the b*tch. He gets so crabby and acts like I'm a gnat or something. We had no conflict until this came around. And it's not like I'm standing over him breathing down his neck asking him to do this and that and this and that.... I seriously only asked for 10 min... He acts like I want 24/7 attention and it's a big deal..
I think once the baby comes he probably won't play it much anymore. But if it's really a huge issue for you just take the laptop away since it is yours.