where do you live

well, I assume it's not hard to take a ferry to the mainland and drive to holland.. take a week off of work and go see if you like weed.

It's not that i find it intrusive, i don't it just seems weird to me that after not talking for a year those are the first questions she asks. I don't want to treasure it, not talking for a year made me forget i had feeling for her which was great. Now all these feelings came rushing back and i'm not ready for her to shit on my heart again.

well, i dont know that much about human emotions and norms, so i can only answer the question "is it random that she blahblahblahs me over the phone".
well, my guess is that somehow the sister mentioned you the girl in a way that she wanted to talk to you, so she prolly said "omg (insert girls name), THISISNOTFUNNY is single and blah blah" but then again, i dont know shit about human conversation so theres that.
anyway, the reason that she talks to you is because you talked to the sister who you met randomly (i presume), so yes, it is sorta random.

anyway, i see three ways this gon play out
1. drama and whatever and you get back together. fuck do i know
2. she gon play you like a fiddle and friendzone you into low-earth orbit, making you her slave
3. you're still hurt, so you dont get back together.
4. you want revenge, so you get together with her sister, so you can get closer to the girl, so you can carry out whatever sick revengeplan you have.

also, i cant count