Funny enough, this happened right before a shower (yes, it finally happened), I was dressing but Aerith couldn't help herself, those silly-yet-masterfull hands
There's also a short follow-up comic. I can't read Korean but I'm assuming it's something along the lines of Edelgard wanting Byleth to flirt with her like Dorothea and Petra are doing but Byleth just thinks she's hungry.