The naughty little sister can't get out of bed as she's feeling unwell. To help her out, her brother takes a thermometer and inserts it up her tight ass to take her temperature. But it doesn't work, so he goes further and slips his finger inside. His sister's asshole drives him wild, and he can't help thinking about how good it would feel to fuck her hard with his throbbing cock. Watch these two as they let their urges take over and indulge in a wild asshole fucking session.