I could think of many ways to make Harcourt appear badass and none of them involve that. However, it is hard to really believe this, though, because after the bar we next see her walking in her underwear through her hotel room because that was 100% necessary and the lingering shots as she walks outside, and on the mission she is knocked out pretty fast. For the show trying to show how badass she is, they also wants to show some other things too if you catch my drift.
Having sex is fine. That's not the issue. It is how the events leading up to, why he wants to have sex, how he goes about meeting someone for sex, and how to the audience he doesn't change from the moment she rebuffs his horrible advances to him having sex. We can just assume he was rewarded. Not that he was rewarded in the sense that someone saw that he was a bad person and gave it to him, but that the show doesn't care about his horrible remarks, he still got what he came for. When you analyze that to what happened with Harcourt in the bar it brings up some very big red flags.