she probably still licks pussy when her husband is not around; or maybe she doesn't care what he thinks and has sex with women whenever and wherever she feels like it, and just keeps him around as the clean-up boy and personal servant
http://politicker.com/2012/12/the-lesbian-past-of-bill-de-blasios-wife/
http://politicker.com/2012/12/the-lesbian-past-of-bill-de-blasios-wife/