When I went to my brother's house because my brother's wife told me she had some urgent business, I was left alone with my beautiful, busty sister-in-law, who was on a business trip! She complained about my brother and wouldn't let me go home! But then she started to blatantly seduce me, showing me her big breasts, which she's been frustrated with for not having sex with my brother for a long time! When I got an erection, my sister-in-law pushed me down and licked my nipples and got me in the mood with a cowgirl position! I forgot my reason because of the pleasure, and made my sister-in-law cum with her intense pistoning until she was satisfied!