My sister hates that she has tiny tits but I love them

My sister is two years older then me and dresses to hide the fact she's tiny on top. Ok her bra say 32A but I know she adds padding to her bra to fill it.
She come home from a date she had with a guy she met at work very upset. I heard her slam her bedroom door and I noticed it was only 9pm. So I got up to check on her and as I neared her door I heard her crying inside. I tapped lightly asking if I could come in. She said no at first then said "John maybe you could help me after all, so come in I need to show you something and see what you think."
I opened her door seeing her sitting on her bed with tears on her cheeks and blood shot eyes. I sat next to her putting my arm around her shoulders and asked what she had to show me? She said "I want you to be truthful with me ant tell me if you could fall in love with a woman with these?" With that she pulled her dress down and lifted her bra over her tiny tits.
I was shocked that she did that with me her own brother but I loved the way her tits looked and said "So what' the problem sis? I love your tits and I hope I can find a woman built just like you are, and sis if you ask me your tits are perfect and your nipples are so inviting its all I can do not to suck on them right now."
My sister took my hand placing on her left side tit saying "But here see there's nothing there for a man to play with or to make him want to play with is there?"
I bend down taking her nipple in my mouth sucking and lightly biting on it between running my tongue around her quickly hardening nipple. She give a moan and held me to her nipple. She then laid back on her bed bringing me with her. I moved to her other nipple as I played with the first one with my fingers. I noticed her breathe started to come in grasps as she jerked her tits up at me. The way she shook as her orgasm hit was something to behold. She jerked and shook for a good minute before she smiled at me saying "That was wonderful John. No one has ever made me cum that way before and I love you for it."
I bend my head back down trying to make her cum again for me. It sure was a good thing mom was away at her brothers for a visit and dad was working the afternoon shift cause when she came this time her shouts and screams would've got us in deep shit. I went for broke and slid my hand up her leg to her tiny throng panties rubbing her clit and sending her into yet a new orgasm. She then said " Oh fuck oh fuck me fuck me bro I need your cock in me now." Well I don't need to be told twice and as soon as our clothes hit the floor I was pushing myself in her tight shaved pussy fucking her like a mad man.
She drew blood on my back with her finger nails as she came even harder being fucked and her nipples twisted at the same time. I tried but I just couldn't make it last as on her 3rd orgasm I pumped her full of my cum.
She pushed me on my back off of her and I thought she was upset that I fucked her at first but she bend down suck our cum off my cock getting me hard all over again. I wanted to fuck her again but she wanted to reward me with not only deep throating me but swallowing when I came as well.
She no longer goes on dates and I broke up with my girlfriend who was a crap in bed when compared with my sister. We have been talking about maybe getting a place of our own so we don't have to fuck in my car or when mom and dad are out. I told my sister that she's the prefect woman for me and she says she feels the same way about me. I have started thinking that maybe we should just live as man and wife and be done with it.