Guys, we have the word of a soon-to-be ex wife. That alone makes the whole accusation suspect.
Second, if we threw out everyone in DC that has had sex w/ someone-not-their-spouse the place would be a ghost town. As anyone who has gone there w/ a special someone will attest, DC is about the most romantic, and most sexually charged place, in the country. (As my Canadian friends said when they saw the Washington Monument, “What part of Washington are you memorializing?!?!”)
You say that like it's a bad thing.