Severus made a lot of interesting noises at the second finger's exploration and purred, rocking back against Charlie's hand with the third finger. He whimpered when he was rolled over yet spread his legs wide, lifting them to give his lover better access.
His eyes rolled up once he was finally mounted. He cried out in delight as his face took on a look of pure bliss. He wanted to touch himself, he did not dare ask permission. The feeling of being filled was incredible.