(This is a situation) Please read. And What do u think?

(me and my gf are bi-femmes-take note)
My Girlfriend has a sister, she's 1 year older than me.
my girl and I stays on their house in weekends..
but just every sats and suns.
(we live together, in different place)
Her sister always want me to play pc games with her.
(I'm trying not to think/give other meaning to that..)
but she's always sitting beside me while watching tv
even though she can sit by her mom, or siblings.
(you know, the sofa was so small)
then she's hugging me. and sometimes i can feel her pressing
her arms against mine, or she's always making our skin touch every time.
and she drinks in my drinking glass.
(thought it's awkward)
she eats the food in my plate when we're eating.
when I'm leaving-to go home. she walks me to the street
until i can hail a cab, and she wont even leave til I'm out of sight.
she always tell me to take care and be safe.
she always holds me while walking.
(even though, again, she can wrap by her sister's arms,
in her sister's side..right? And when she's leaving for school or some
hang out with her friends, she always kiss her sister and mom
to say goodbye, and yet again, she's always kissing me too.
(Why did she have to do that?, she don't know me)
She has a boyfriend, and she says she's straight-actually she's
a play girl) she's a bit childish, or she's just acting like that.
She wipes my sweat in the forehead sometime, and makes
sure i don't get perspired. she even ask me everytime, if I'm hungry,
(like she's showing that she cares) etc. .

so what do u guys think?