PPPE-246 _My lover refused to let me play naked, so she started to fuck my lover's older sister

My girlfriend will definitely never let me "do it" without using a condom... On the occasion that I recovered from my broken leg, I thought maybe she would let me "play bareback" this time, but the result is still NO! I kept resenting that millimeter-thin membrane. While I was imagining the extremely happy feeling of being fucked without a condom, my cock unconsciously rose up. At this moment, my lover's sister suddenly displayed her huge breasts in front of me and offered to allow me to fuck her and cum inside! I love my girlfriend, but faced with the temptation of an extremely sexy sister like this, how can I restrain myself! I was engrossed in enjoying her beautiful breasts and the wonderful feeling of "naked" play, and I ejaculated non-stop! By the time my girlfriend found out, I was so happy I couldn't stop fucking my lover's sister..