Whoops!.... Ok guys tell me what happened cause I don't know...?
So when asked her out yesterday, she mentioned her (older) sister as if she was meant to be going with us too, but I thought it was a test so I ignored it. Then I made a standard joke that I'm meeting Anne at 3pm, Claire at 7pm, so 5pm will be perfect. She just answered "aha" after 10mins so I said: "I'm just joking calm down!" - she answered: "Yeah right...

" and then we texted a bit more, and the usual chemistry was back on.
In the evening she texts me: so what time are we going tomorrow? I didn't want to text her all the time! - she's gotta have time to dream about me, be nervous etc.

- So I just gave a short response.. but no - she texts back...

I couldn't stop her so finally I said that I'm going to eat dinner.
Today in the morning she texts me (signed as her younger sister) that her older sister is somewhere else until 6pm, so what are we doing? - I responded with a joke about her parents and my mommy coming too. Then she said that maybe her female friend should come instead of the parents. I joked about that friend again, and then she said that her sister with boyfriend will join us later.
And I can tell from the way she was texting me, that she was a bit different - like a bit more serious and perhaps a bit nervous, and her jokes were a bit less funny
What is it? A sort of First-date-LMR? Or is she not ready yet? Or should I smell LJBF approaching? I'm not gonna kiss close her in front of her sister (even though I guess everybody knows my intentions there)! But I totally should escalate if I don't wanna end up in friend zone...
Help! What's going on in her head?