Watching sister being slutty (part-1)

Its a story about my sister being slutty and me watching her get fucked by different guys in a day and its a real story

So telling about my sister she is not that tall and is about 5'2 with good balanced curves having busty tits with dark brown coated nipples she is on the brown side, her tots are a bit hanging like when the time i saw her tits while she was fucking one of her boyfriend they semed a little uneven but it was not noticable.she is also a little bit bitchy and also had multiple boyfriends in her life and had fucked most of them according to her nature, but as a brown girl she was quite slutty with boys that were attractive to her and polite in front of the boys that she didn't liked or didn't knew. So its a story from a long time ago when she was about 20. She was dating a guy and also had a boyfriend with whom she wanted to broke up with. One day when parents were out she told me that the boy she was dating wanted to come and she told me that she wanted to talk with him in private and told me not to disturb them . Then the guy comes and she takes him to her room and locks the door then they started playing music a little loud, so i went to check after some time trying to hear but i could only hear some soft screams . So i wanted to check what they were doing, i took a peak from the void space in the key lock and it was very much visible what they were doing, my sister was lying on her back on the bed while the guy was eating her up, she was looking like she was having pleasure as her eyes were half closed and her back was arching a little bit the guy was licking her pussy and her legs were shaking a little she also started to moan a little and then suddenly the boy grabbed both of her tits and started to move them and then started to pinch both of her nipples while licking her pussy my sister was feeling the pressure and she moved his hands from her tits but the guy grabbed both of her hands and moved them under her ass and pinned her ass so that she couldn't move her hands and he again started to pinch both of her nipples after a time my sister was exhausting calling him to stop pinching her nipples that they were becoming sore but the guy didn't stop after a time she cried out loud with moans and cummed the he stopped, then they both were lying side by side and then suddenly the guy rose up and started to slap his dick around her stomach and tits my sister offered to jerk him off but he told he would only cum if he is penetrating her but my sister told him that it's too early in the relationship to have penetrating sex then for some time they were busy doing fore play and kissing so i stopped watching and went to my room to do my work after an hour or so he left . After some hours my sister was arguing with her current boyfriend (which she wanted to leave) on the phone and after ending the call she told me that her current boyfriend wanted to have some talk with her so he is visiting by , she told me that they broke up some days before i also asked her if she was sure and she told it's not that much of details i need to look after. Then after about 30-45 mins her boyfriend came and they instantly went to the room where they were arguing a bit so things were a little bit noisy. I again went to see what they were arguing about and if her boyfriend would hit her or not considering the tense situation
When i took a look i saw that suddenly he hoisted her up and threw her on the bed got on top of her very fast and started making out my sister wasn't also protesting and she was also complying with him and then he got up removed his tshirt in one go and threw it away on the floor and then pulled up my sister with one go and aggressively took of her tshirt and it also made a sound like it was torn a bit , my sister was a little angry and told him what was the hurry . As she wasn't wearing a bra which she doesn't unless she goes out her boobs bounce on then he started pulling her pants off and took off her underwear easily. After that he took out his dick (which is couldn't see as his view to me was his back) and suddenly shoved it in her then my sister makes a loud moan with eyes wide and then he was going in and out with some slow pace at start then he started to go a bit faster them she was moaning out and out also trying to push him away to stop but he overpowered her and after some minutes he flipped her on her chest and her ass facing his dick he against shoved it in and started again and my sister was moaning again louder , he slapped both of her ass cheeks while fucking her and kept continuing it after a while he pulled her ass up and keeping her in a Doggystyle position he clapped her pussy pulling one of her tits behind and one the opposite hand behind after 5 minutes or so he pulled out and cummed on her ass-cheeks . After that she was lying on the bed after he fucked her relentlessly, he went to the washroom and i also stopped looking as i was hard too after seeing all that , again after some time i wanted to check again and when i did they were half dressed and he was sucking on to her tits while she was using her phone and he suddenly slapped her tits and my sister pulled away and told him not to hit her tits and ass again with an angry tone. Then i left to my room. There are some more stories related to her , comment if amy of you wanna hear more