Havent Tried a threesome but i experienced a foursome! [GROUP]

Im not good with telling a story but hope this is interesting for you guys!

One night i was hanging in a bar in makati with my friends when a good looking guy passed by in front of me and He caught my attention. So i followed him and eventually were talking. Lets call him Mac. My friends left so i decided to dance with Mac.
We were on the the dance floor, then he asked me if I want to join him in his place. I said Yes. Later he introduced me to his friends which is a couple named bianca and gary.
Mac asked gary if he can drop us off to his hotel. So while walking to the parking lot Bianca asked me how old i am and told me oh youre in the age of consent thats fine. I got really confused with what she said.