It's crossed my mind a few times that she, perhaps, has some unusual kinks and fetishes of her own? Such as being a cuckquean:
https://en.m.wikipedia.org/wiki/Cuckquean
This isn't a dig at kinks and fetishes by the way, we all have some conscious or subconsciously. Whatever floats your boat and all that. Some are considered to be more socially acceptable than others, especially when you have a 'wholesome' family vlogger image to maintain.
She might even approve of his, alleged, bisexuality/closet homosexuality. It does come across as a marriage of complete convenience, in more ways than one.