Exploitation of Innocent cousin sister AMMU

[Pradyumn]

I had been dreaming about Ammu since that leggings incident. Everytime I went to their house, never got alone time with her. I was desperate and frustrated at the same time. I also tried to maintain gentleman image so that they would give me more responsibility ( read exploitation) to take care of her. Like the doctor ordered, I got one such opportunity. It was a cloudy day and was sleeping in my room playing with my cock dreaming about her hot seductive curves, got a call from my uncle. 
Marriage on my aunt side is maybe like a blessing to me. My uncle gave me inputs about how the marriage is next day and Aunt is very busy. It would be late by the time he comes back and hence I have to take Ammu for town to get Mehandi on her hands. Calculations started on my mind, it was 6ish evening and my uncle would be back by 830-900 usually. I reassured my uncle about everything and started to get ready. I knew time was very less but I just wanted to be completely horny around her. 
I rang the bell and sexy Ammu opened door, she was completely ready wearing sleeveless long red kurta top and black leggings. She was looking gorgeous with simple make up. As she asked for 2 minutes to get the key and check on other things, I was just wondering how this conservative dumbo is wearing low neck sleeveless kurta, and normal instead of long kurta. She also informed that her mom might come back and hence we need to return early. I understood her worry and we travelled in car to the Mehandi place. There were no customer, she had to sit on stool to get Mehandi. I stood opposite to her looking at her revealing cleavage covered by her thin transparent veil. She gave another hand after the her left was completed. That's when her white veil was about to fall down and when she couldn't move either of her hands, I went to pull it back to her neck from behind. There it was her fleshy cleavage, anyone could make out the size of her balls looking at that big U shaped exposure. It was done and that's when my dumb sis realized she can't use either of her hands. I reassuringly nodded looking at her and gave out the money from my wallet. I picked up her useless purse and stuck it in my pocket. But now I saw her trying to get up from the place with the help of only her legs. She was bending slightly giving me more glimpses of her amazing boobs. She was wearing black bra inside, which made the view even more impressive. I went behind her now, held her by slightly lifted arms just near her armpits. She got up and I saw how her kurta wasn't even covering her ass because of hugeness and that position of sitting. She had sat directly on her leggings. I saw some rusty pieces sticking on her leggings. Kept that on mind and moved from there while I slightly extending kurta to cover her ass and modesty. 
I had parked my car in underground of that shopping complex. We were going towards it, as there was down slope to move inside I put my hand in front of her stomach as support. My hand was getting comfortable checking her softness there and frequently pressing my hand into her fats to slow down. We got down and had to move towards the corner where our car was parked. I went and opened my door and sat, gave  " oh shit, I forgot " expression and came back near her door to open her door. [ I know I could have done it from driver seat only ] 
Our car at corner and her side of seat was to the corner side.   Ammu was behind me when I opened and I let her move forward and held her by waist. 
" Wait Ammu, What is this " by lifting her kurta revealing her ass. 
I turned on the torch and threw it on her ass. I could clearly see the shape of her ass and panty outline in that tight black leggings. Just when she was about to ask, I took out a rusty piece which was sticking on to her leggings and showed it to her. 
" Aiyoo. I think it is from that stool I sat on. Is it too much??? " Helpless worrying Ammu asked. 
It was definitely not much, but who would let go of this opportunity. Huge ass girl with her kurta lifted in such a reassuring private place. With the door open nobody could see what was happening in this dark place. 
" Yeah Ammu. Too many tiny pieces and lot of dust. Give me 2 minutes ". 
I told her to rest easily on car and inserted back side kurta in her leggings. Stuck the phone in my pocket so that light is directed to her ass. 
My hand gave smooth polish on her ass honestly getting off most of those rusty pieces. After the actual work is done, I used both of my hands hold her ass cheek and squeeze. This definitely reminded of that day for both of us I thought. I also imagined how horny she was that day. Gained courage and hence started pinching her at all fleshy places. Started giving her nice slaps on cheeks making it shaky. I also went to her back thighs and gave light squeezes. 
" It's gone Ammu. " Giving a little pause " Except these dust "
--SPANK-- Her complete ass shook for that. 
And I covered her ass back and helped her to sit. I looked at her face and then still revealing boobs. 


" Why you sweating so much Ammu? ". 
I just rolled my index finger beside her ear on face. 
" You can't use even tissue right? "  Asking this I took out a tissue from the box and rubbed it on her face slowly to dry up her face first. That's when i removed the veil from her neck for which she cooperated and threw it on back seat. I took out couple of tissues and romantically spread it around her neck and saw her closing eyes and straightening her neck. Her U shaped breast exposure were seducing me.