My girlfriend, who I live with, came back to her parents' house for three days. Her friend, Elisa, came to check on me to make sure I didn't cheat on her... Even though I know cheating is wrong, I can't stop staring at Elisa's voluptuous G-cup breasts... "If you can hold off for two days, today and tomorrow, I'll have sex with you on our last day?" She suggested, and I could only say "yes" to her unexpected proposal, letting her fuck me to the brink of orgasm hell... I tried to hold back my ejaculation in preparation for our last day of sex. On my last day, I exploded. No matter how much I let out, my sperm just wouldn't dry up, and my erection wouldn't go down. Whether she was cheating or not doesn't matter... I'm obsessed with her G-cup breasts right in front of me. To her... I'm sorry...