I am meeting my girlfriend's sister...advice?

Question

I've been going out with my girlfriend for a month now, and her sister wants to meet me. I've talked with her on the phone and she seems nice, but I'm wondering if anyone out there has any tips on how I should act or dress or what I should speak about in general? I've met my gf's friends and they like me, but something tells me meeting the sister is a lot different. fyi, she and her sis are very close.

Answer 1

don't stare at her ta-tas.

Answer 2

I don't know you or her but avoid the come on from the sister.  It may be a test.  

With that said, be yourself and act accordingly.