A lot of gay men are invested in the fantasy that the performers are truly straight. It isn't a question that can be resolved, because it relies on self-reporting. I think we all know men primarily attracted to men who self-describe as "straight."
Sometimes even the self-reporting isn't correctly conveyed by intermediaries, since it's all part of a make-believe world.
And, the fact that someone is married to a woman and leads a "straight lifestyle" (whatever that is) isn't conclusive evidence of anything.