Seeing his sister's ass swaying from side-to-side Aster approached Alice until his face was a couple centimeters away from her ass, he could see a thin wet spot forming in the middle of her panties due to her love juices starting to flow from her pussy which made him smile before licking that same spot over her panties.
"Hnnn ♥", Alice reacted immediately, the feeling of her brother's tongue through the thin fabric of her underwear was still quite stimulating and she wasn't the only one, Aria who was still standing next to Lilia also started getting wet.
"I'm not doing anything so why am I getting wet down there also!!!", she thought,
Lilia noticed her confused expression.
"It's normal, you are feeling "anticipation", your body does recognize Aster as your lover so it is normal that it prepares for him beforehand, although you are not going to use the front entrance it will still wet itself to make it easier for him, in other words you are horny ♥".