I cant remember where i read it but i think i remember reading that you are late 20s so you are either the one in the middle or the one at the back. Also if amy is your step sister then the liklehood is that you are going to be similar ages so the man at the front cant be you. My actual guess would be the one in the middle as you have also posted the picture of you hanging upside down (same t-shirt), showoff!