Is it normal that i dream about having lesbian sex with my sister?

ok, im not ging to lie, i find the female body very attractive and often watch lesbian porn and pleasure myself, its no big deal. I have had 2 boyfriends and im only 18 (female), i am straight but find girls hot, only sexually though, in no other way (relationships etc)

I woke up this morning quite excited but confused, i had had a dream about my sister who is 19, where she had came into my room and dived straight into my mouth kissing me and then whipped out a pink didlo/strap on and started fucking me with it...all the while i was enjoying the entire experience, more aroused by the fact that someone from our family had walked in on us....I woke up then and i was a littel startled, then i closed my eyes again and started to dictate the dream a little much to my enjoyment. I started off with her sucking on my increasingly aroused clit and fucking me further with her dildo and then her bending over and me tonguing her clit from behind, her big hairy, juicy cunt on my face...soo hot! I then began to focus ion her boobs, her juicy, D cup titties...wow! Sucking hars on them and ducking my face into them...my boods are only a B cup so it was highly enjpyable for me...i felt like she finally took control over our sister relationshipe, because she is normally shyer than me and im more dominant...

As i wrote this im finding it hard to not get turned on big time, i woke up and found my panties were drenched wet with my juices and it didnt take me long to go over the dream again nd pleasure myself twice or three times...it was very very nice.. The dream was such a turn on, as we were entangled for so long and we could carry out such performances again and no one would ever suspect anything because we are very close as sisters... Before, myself and my mother had been drinking and i began to admire her massive G tits, like i would love me some of them, and was going to make a pass at her but stopped, even though we were sitting on the edge of her bed...I wanted for her to touch me badly....horny again here...but i chickened out and nothing has happened like that either since..i wsa drunk! I have also had some fantasies about my mothers sister who lives next door and she too has big titties and her partner works late hours so it would be perfect if i went in there and came onto her and perhaps be there for him to see whwn he arives home, its an amazing fantasy!!

Theres been so many and i dont know why i cant bring myself to make these fantasises come true..theyd be highly satisfactory!! But i know im not a lesbian, on an emotional level anyway, just phsically attracted to some women, i cant quire put my finger on it!
I just want to know if it is normal to dream bout sex with family memebers and if theyve ever come true, how did it come true? Im off to pleasure myself again..mmm