Absolutely flustering Astarion with the tiniest little displays of affection.
Astarion, the suave master seducer.
Can he give you a full body blush because he just whispered the lewdest thing into your ear in public? Yes, absolutely. And he does that quite often because don't you just look beautiful with this delightful shade of pink on your cheeks.
But when you just turn and give him a sweet little kiss on the cheek and tap the tip of his nose before strolling away with a smile, whispering that you love him under your breath...