Turned Into Bi

We had my dad's brothers wife and daughter stay overnight while passing through I had only seen Beth a few times over the years growing up she was 17 and we had to share my bed a double upstairs dad in his room and aunty on the pull out bed in the living room
I was in bed maybe an hour before falling to sleep I woke feeling Beth hand on my right breast as I sleep on my back thinking she had turned in her sleep disregarded it not long after her hand pulled away then slipped through the gap in my nightie and cupped my bare breast then playing her thumb over my nipple my nipples are highly sensitive when played with
I turned my head to talk to her she was so close and before I could talk she covered my mouth with hers pushing her tongue in and pinching my already swollen nipples before I knew it she had opened my nightie fully and began to suck my nipples and quickly pushing her hand into my panties rubbing my pussy and my clit it was crazy but felt so intense I still had not said anything other than moans and yes oh my yes
She came off my nipples crouched over me and whispered your pussy is mine pulling off my panties she opened me and dived her face into my already wet pussy licking me sucking me and even biting on my engorged clitoris I had to hold my hand over my mouth to stop me screaming with delight as I orgasmed and spurted her with my cum she sucked every bit up carried on bringing me high again I had to grab her hair pulling her off my saturated pussy kissing her wet mouth pulling open her nightie and sucking on her small pointed breasts I felt I needed to return loving she stopped my hand towards her groin saying she was on her period and always felt intense need to satisfy herself someway she said she had planned each move not wanting me to stop her bevouring my pussy she then kissed me gently said thank-you cousin maybe another time she turned and was asleep in minutes they left first thing in the morning she told me her mother needs a good fucking and how my dad could have had her she would have waited for him to come to her but he did not now I guess I am bi now not fully lesbian but I did enjoy it I have a follow up will do it another time