So I borrowed $20 dollars from my sister the end of last week n told her I'll give it back when I…

So I borrowed $20 dollars from my sister the end of last week n told her I'll give it back when I get paid which I haven't yet but when I barrow I ALWAYS pay back the day I said I was she gone txt me this morning asking when I'm going to have it like really?? ur the same person a barrow n won't payback unless someone ask you do you have it like I love my sister but really don't ask me like I don't give it back only reason you don't have it cause I didn't get paid yet!