Remus involuntarily grinned at that; Sirius' comment was unnecessarily harsh, and given any other context, Remus would not have hesitated in distancing himself from that conversation - yet, he found himself biting his bottom lip in an attempt to quench his smile.<br/>"You're such a piece of shit," he responded, his voice airy but strained, in an obvious attempt to not let it show truly how much Remus was humored by the comment. It was only after having finished the insult Remus finally dared to meet Sirius' eye, afraid he wouldn't be able to keep a straight face if he attempted to deliver it facing Sirius.<br/>"Charities are ego boosts and you know this," he added, a smile tugging at the corner of his mouth, before finally turning to open the front door and exiting the building.