"Touching me a lot in the process" was a bit ambiguous to me. It was a sports car, and I've ridden in a sports car with a male co-worker (and I'm male), and I had to reach around awkwardly to get the seatbelt in his small expensive sports car.
I wouldn't help another man out with a buckle, and I'd feel really weird if one helped me with one, but if that "uh, I don't want to reach toward my male co-worker in a confined space" thing wasn't there, I could totally imagine at least reaching over and grabbing the buckle and handing it to the person, and they might happen to brush against me in the process. This is potentially a "male-male interaction weirdness" kind of gender treatment difference. If the guy grew up with younger siblings he might even be in the habit of doing this kind of thing without thinking.
Again, that's where the ambiguity comes in. If, due to female anatomy, the back side of his arm happened to brush against her chest as he reached for a buckle in a confined space, that could be considered "touching her a lot", but is that the same as a grope?
Also, let's say he did have some intent to have some physical contact. She doesn't explicitly say where he "touched her a lot". Was it on the leg while he was buckling her, on her shoulder as he was reaching for the buckle? Maybe he was in fact trying to initiate some limited physical contact, known outside the work world in some circles as "kino". "Kino" from someone you're not attracted to is seen as creepy, whereas from someone you are attracted to isn't, and let's be honest here, we don't all explicitly say "may I brush against you as I reach for this buckle" or "may I kiss you" etc.
In a perfect world, unwanted touching wouldn't happen at all, but playing devil's advocate here... here's a guy with his female coworker (and work is where the most marriages happen outside of college, I've read) who agrees to take a ride in his sports car. Aside from explicit verbal discussion about it (which again doesn't happen 95% of the time when contact IS wanted) this guy had some reason to think she might be interested, and initiated some possibly very casual contact. Unless it was an outright grope, I don't know that I'd read so much negative intent into it. At some point people try to break the ice.
For example, at various jobs I've had male coworkers touch my arms or shoulders while speaking to me. Some people think that this helps establish more psychological closeness, although I often don't appreciate it, but I understand the intent. Unless someone were to go out of their way to grope on me, I tend to brush it off and move on with my day.
It's totally possible her experience was different than what I'm reading into it, but again, it was ambiguous enough that I can see other possible interpretations of that interaction.