I had been involved in several threesomes & more-somes, but had never been one-on-one with another woman before. My girlfriend was also curious about making love to a woman and had always wanted to try but was never able to find a willing partner. Her boyfriend was very jealous and would never dream of sharing her with another man, so a foursome was out of the question. One night, I think more out of curiosity on his part as to whether or not his girlfriend was capable of being with another woman, and also since he had had a couple of brews and was in a jovial mood, he suggested that the two of us have some playtime alone. After some conference time between the two couples, both boyfriends agreed to allow their ladies some "private time to explore the possibilities."
We slowly walked to my boyfriend's apartment. Tina & Bob held hands and giggled while Batt and I teased each other, Batt's hand firmly on my ass pinching it from time to time, my hand resting on his belt buckle, slipping off occasionally and brushing against his visible erection, then back up to his belt buckle.
When we arrived at the apartment, Batt took our jackets and I ran to get some drinks for everyone. As I came back in the room I noticed how hot Tina looked, dressed in a tight sheer blouse, which accentuated her full breasts, and tight jeans that hugged every curve on her body. Her nipples poked through the material and I couldn't take my eyes off of them. Batt noticed me looking at Tina and asked Bob if he was sure that he didn't want to stay and watch what the girls were going to do. Bob hesitated, then said, "No, let's go." And with that, it was just the two of us. I stood in front of Tina and gently caressed her hair, then slowly reached down and took her delicate hand in mine. She stood and I led her to Batt's bed.