Sis really wanted to get better at sucking dick for her boyfriend. Since i’m bigger than him, I offered to help her practice. Now she never misses the opportunity to get better. Even when we’re at school she meets me in the bathroom and gets on her knees
Your girl doesn’t suck you off much if at all, but you noticed some marks on her knees. She found a way to prevent that when she made her following visit to your best friends house.
