Am I legally resonsible for hurting someone accidentally

by Nicole
(Las vegas Nevada)

On Oct 29th a bunch of friends, family, and I went to a Halloween party held at rented private special events venue. We all had been drinking and unfortunaletly I fell a few times that night. I originally assumed it was because I was drinking but when I fell out of bed the next morning I realized it was do to a bruising and weakness under my foot from a previous bunion surgery I had had, Apparently the heels I was wearing were to high and my foot couldn't handle it, were I originally thought it was just normal pain from wearing heels.

7 days later I get a call from my cousin that his girlfriend wants to sue me because apparently when I fell I pulled her arm from her socket and she now needs surgery. After my fall she never claimed once that she was in any kind of pain at all. We spent several hours more at the party dancing all night and I have pictures of her dancing and even holding herself up on all fours! After the party we went to go eat and she drove and again never 1 complaint about her shoulder at all. I did not recieve a call the next day, up until 7 days later!

If I dislocated her arm wouldn't she have known it right away? how am I to believe that something else didnt happen in those 7 days. So my question is does she have a case? I do not own anything besides an 11 yr old car, I am a self employed hairstylist and am barely making ends meet. What would be my reprocusions if she does have a case, and or does she have a case?