About 15 years ago,a guy I grew up with was riding his motorcycle home after drinking all day starting at the KC St.Pattys day parade. He must have thought an exit ramp was still the highway. They say he was airborne almost 200 feet.
I was pallbearer at his funeral. He probably never knew what hit him,and nobody else was hurt. But I think about it every St pattys day.
As one poster on another forum signs his posts "If drinking and driving is illegal,why do bars have parking lots"
If I were you,I would make sure I had an escape from your sisters house. So if the need arises to leave,you won't have to wait until someone else is ready.
Fred