Elder sister,parents and me

When I was 14and my elder sister 19,during our talk she secretly told me something. She told " five years back when I was only 14,when our parents and me were all alone at home they wanted combined bath. For the last many years although they wanted to do it,they couldn't because children including me were there.Since I was only aged 14 they also participated in it. After entering the bathroom, we all became totally nude. I found dad through the corner of his eyes was looking at small but firm boobs pussy and buttocks. I was also seeing a man in fully naked condition for the first time.Mom was 20 then and dad 30.I also looked through the corner of my eyes dad's huge cock. I enjoyed it. They started their activities ignoring my presence. Dad brought mom's right palm towards his half erected cock. She fondled it and made fully erected. Dad inserted his middle finger into mom's pussy hole and made to and fro motions. Then mom lowered her face and swallowed his cock. Then she turned over her buttocks facing dad. She bent forward. Dad spread her asscrack and inserted his huge cock into her pussyhole and made to and fro.motions. This continued for fifteen minutes until it cummed into her pussy. They cleaned themselves and took twenty minutes rest until the cock became normal. Through out my body became too hot seeing their activities. But I could not tell them . Perhaps dad wanted to participate me in the activity. But he openly couldn't admit it. Luckily mom understood my condition, afterall she is lady. She suggested dad " my darling, please help her and involve in our activities. Dad and me were extremely happy to hear this. Dad pressed hard my small but firm boobs with both of his palmsand then swallowed them. Since his wife's ( my mom's) boobs were sagging last many years dad verymuch enjoyed pressing my firm boobs. Due to cycling my hymen was already punctured. As per Dad's suggestion I took a position so that my buttocks was facing him and I bent forward. Dad spread my ass Crack and inserted his huge cock into my pussyhole. His huge cock was too much for my average sized pussyhole. So when he made to and fro.motions with his cock, I started screaming out of pain. Still I was enjoying. During this, through the corner of my eyes, I looked at mom. From her expressions I could find that she was enjoying. After dad's cock cummed in my pussy,we cleaned ourselves and finished our bath waiting for the next day for other activities.