Yes, though not that exact situation, I don't find sexual activity any more of a hindrance than any other pleasure. Personally I find no correlation between that and the frequency of good meditations, provided that is promptly dropped and does not show up during meditation. I make no claim of fact, but this is my opinion based off of what I've experienced.
But I would not argue against the fact that someone who abstains from sex, as well as other unnecessary pleasures, will probably do better in meditation than the one who doesn't. I'm sure they would, since sensual desires in general are further from their minds.