It seems like Melisa was so exhausted that she did not wake up even when Alister bathed and changed her clothes after their hot session. Alister watched Melisa's exhausted face with a complicated look. He didn't want to do this either. But Melisa's entire family had asked Alister to do something, and he had to do it for Melisa's safety as well.
After finishing putting Melisa to sleep comfortably on their bed, Alister took out the medicine bottle that Teresa had given him. Alister carefully poured the contents of the medicine into Melisa's mouth. Teresa told Alister that Melisa had to drink it all for the effects to last. But when Alister had only half poured the medicine into his wife's mouth, his hand tremblingly pulled back to keep the bottle away from Melisa's lips.
"I... I can't do it."