AITA for dropping my sister in law at a bus stop because she would not stop backseat driving?

My sister in law is from another state and lost her drivers license for reckless driving. I was driving her on some errands as a favor. She thinks that she discovered Google maps for some reason, had it on and insisted on giving me directions the entire way. I have driven in this area hundreds of times, I did not need directions. Pus the directions she was giving me were mostly wrong. She also commented on my driving habits, which seemed ironic, since I have never had an at fault accident and she lost her license.

She became angry when I ignored her directions and advice and I thought that she reached for the steering wheel a few times. In fairness, she did not actually grab the steering wheel, but it was enough to scare me. I pulled off at a Park and Ride, gave her my bus pass (it had enough on it to get her home) and said "Get out, take bus number 37, get off on stop number xxxxxx." I left her at the stop and drove home.

That entire side of the family is now angry with me. My wife was a bit upset, but she calmed down after I explained it (she knows her sister well). She thought I should have warned her before dumping her at the bus stop, but thought that my sister might have eventually grabbed the steering wheel. I am the asshole?