Monday is a DC Holiday.
It would be newsworthy if this happened in the oval office, or it happened while he was married, or she was underaged or it was with a homo. Apparently none of this is evident. So, aside from someone alleging he had a tryst with someone of ill repute, it is a nothing burger. I don’t even think this was in the dossier or she is Russian.
Why is heterogeneous sex a bad thing? Are Puritans still around and calling shots? There is a reason God installed testosterone hormone in men and estrogen hormones in women.