Jesus Christ.
I'm married, happily married for over eight years now, this is my second marriage, I have spent PLENTY of days on couches just like that with female friends of mine playing games, watching movies, whatever, just as I've spent plenty of days like that with my male friends. It means nothing, it's friends playing Game Boy, the only difference between them and you is that they probably have the maturity to not think about fucking everyone they work with. Your life will get easier when you stop assuming that all men and women with great "chemistry" have fucked or want to, sometimes people just get along well.
In short, grow up.