Aberforth felt incredibly exposed and vulnerable like this. The warmth of her worked wonders towards soothing such feelings, but the bit of sense he had left, that wasn't clouded by the potion, told him to pull away. He was torn between his instincts and his desires. It was impossible not to give in to his desires though. After denying himself for so long, after being alone for years, the potion had swayed him to giving way and with that he had lost himself.
"I'm not-" Aberforth tried to begin, licking his lips as she moved his hands to her hips. The movement distracted him for a moment, swallowing the lump in his throat as he moved his hands appreciatively along her sides before settling. "It is not that-" he tried again after a moment, unable to look into her eyes as he tried to figure it out. "I have seen much in my 20 years and it shows." he finally settled on, his thumbs rubbing circles into the peaked bones of her hips.