Yes, it's OK because it doesn't have anything to do with me and doesn't impact me (or you) in any way. Women should be able to do whatever they want to with their bodies - even if it's not something you approve of. Women's sexuality is not "for the pleasure and benefit of her husband (or any man)". It's for a women to express and experience in whatever ways she sees fit and if you find that immoral, I have some choice words for you.
Just so you know where I stand, I edit and publish a sex-positive publication on Medium called Sensual: An erotic life. I am bisexual, polyamorous, and also happily married. I have friends who are sex-workers and consider myself to be one of the most "moral" people I know because I am in integrity with what is meaningful and important to me, which includes being kind and honest with the people around me.
I have no interest in what that woman does with her body or her time. It doesn't impact me or affect me, but the fact that you consider a woman consensually doing whatever she wants with her body - something that is harming absolutely nobody - as much more disturbing than a decade of rapes at the hands of someone Gisèle Pélicot should have been most able to trust is just fucking horrifying!!!
I'm going to pour myself a drink. You are shaking my faith in humanity.