Family bond

I had noticed an odd thing about my mother: and younger sister who when at home never wore panties.
One day Mom had just gotten out of the shower and grabbing the newspaper plopped on the couch.I was seated opposite to her scanning through on my mobile. After some time she shifted, and when I looked up from my mobile, I took a double take. I was staring at a mature fertile and real life vagina and it belonged to my mother. It was thrilling.
Then she did something completely unexpected.As she turned the page over She lifted one of her leg and kept her foot on edge of tea table in front of her. In doing so her legs parted a little more. I could see mom had shaved around the sides but kept a nice trimmed bush up on top. I asked mom if I could smell and taste her most treasured possession.Mom readily consented and parted her legs to give easy access to herson.

My younger sister was now 20 year old and sexy as hell.She had blossomed into quite a young lady. She did not have monstrous tits. She was just like mom, small firm tits, slender body.
One evening she had changed into her nighty and was sitting on the couch.Her knees were drawn up, her feet on the couch, arms around her knees her chin resting on her knees. Her naked pussy was facing me.
I got up from my seat and stood in front of her. As I laid my palms on her knees I remarked on her bald pussy and how attractive it looked. I told her that her pussy was as attractive as mom's and could I taste it just the way I tasted mommy everynight.
Sister was shocked to know of my sexual encounters with mom. Without any further ado she opened her legs presenting her virgin pussy to me. My hand caressed down her soft pubic mound. My finger traveled all around her slit as wetness spread through it. My finger slipped between her slit from her small swollen magic button down to her tight vaginal opening.
I was lost, i couldn't stop myself from toying with her mound. I could see her shaking from the pleasure.
Oh, brother I love it. Show me what it feels like, please I want you to.
This story began when I was 19 mother was 40. Now I am 26 sister is 24 and mom is 47. Me and my sister have graduated and working. Mom has left her job and stays at home living a leisurely life.
I have been enjoying a sexual affair with mom since the day I got to see her pussy. Sister and I have been lovers since that first evening. As far as anyone knows we are a married couple. We don't have marriage documents but have same last name. Over the years sister has become very good in bed and learned that she does enjoy mom's pussy. Three of us share bed daily and have threesome leading a happy life.