I think after the graveyard scene Astarion is up for proper kisses. And Larian manages it just fine with Aylin and Isobel and a few others from memory, so the animations are in game. Hugging also exists - Shadowheart and her parents for example, Karlach and Tav after Dammon makes it so she can touch folks for a bit - But apparently such niceties don't exist for fully romaced couples. Sigh
