Hearing his brother's words, Rabastan murmured them back, "For the best. For purity." He felt power and conviction behind these words.
Rabastan's head snapped up, "And what exactly are you implying, Ro? Snape and I were colleagues. We happened to share an affinity for precision and dedication to Potions, especially experimental potions." He heard the innuendo though, and it discomfited him. He shifted in his chair, then looked around the room, not sure he wanted to see his brother's face.