Wow, like, no kind of self control. Kokoro's right there just watching ya'll mate like rabbits and you could care less.
That shows how based Rinnosuke and Byakuren are: they don't care about being watched when they can make love to a motherly goddess (from Kourin's POV) and a handsome man (from Supermama's POV). Seeing them both blushing is just beautiful, like they're overwhelmed with passion and desire.
Furthermore, although Kokoro looks says "come on, can't you two get a room?", maybe deep down, she just want to join them. I hope the artist will go this way; since some artists pair her with the shopkeeper, it might be cool.