He swept down and kissed her once she swallowed. He tasted like the potion, but for some reason it didn't seemed nearly as nasty on him.
He pulled her against him, his tongue exploring the inside of her mouth and his hand resting on the small of her back.
Suddenly, her stomach began to contract in pain. Severus wrapped his arms tightly around her and let her lean against him as the agony racked her body. He seemed to have expected the effect of the potion yet failed to tell her; she made a mental note to mention that later.