Resolved Question: Is this alright to ask my male friend?

I got married boyfriend put forward their own place to stay a night couples. With the agreement with his wife. I am friends with both of them. I would like to know if it asked him to determine Hey, my friend spent a night, she slept in the living room, who is in bed with your wife or your stay in your computer? He stays up late on in the living room computer. I believe him, I just want to know what will happen. His wife goes to bed early. He did not sleep late into the night, because he has insomnia. They only have two bedrooms. A couple and others for their children's children. I just want to do the right thing only. If there is no need to ask him, then say so. Thanks