彼氏が家にいる間に、彼女のいとことバルコニーでセックスしちゃいます

I'm going on a trip to visit my girlfriend in her city, but when I arrive her cousin greets me in a very sexy robe and tells me that she's not at home, that she had to go out to work unexpectedly at night. She meets her boyfriend at the house but he is only there, he starts flirting with me unexpectedly on the balcony and after a few kisses and warming us up he starts sucking my cock while I'm standing