"We have it in the Colonies, too. Had. I guess no one ever thought to use it as an excuse to kiss." Not that it matters. It's something to say, though, before Martha takes the initiative to break the barrier. The bot, evidently satisfied with a quick kiss, showers them with confetti and goes off to make someone else's life awkward.
He immediately feels guilty for being standoffish, both in the present and in the fake future that the wardens showed to them. Before Martha has a chance to leave, he relaxes his hands to her shoulders and kisses her. Fairly quick and chaste, but not bot-motivated.