I dont know either, actually. I had a BMW X5 that I got new that had electrical gremlins and stranded my wife once at the grocery store, and another time had the lights not work, with all sorts of error messages, when she had went to a girlfriends house for "girls day / night". This was all within the first 1k miles or so.
She had been able to video all the error messages on her phone. I took it in for service 4 different times and they kept saying "its fixed" then 2-3 weeks later, the lights wouldnt come on until she power cycled the car or something. After the third time, she basically told me she didnt feel safe in it. My wife is "very" mellow, and I was right there with her. I ended up getting BMW to basically give me a new one (4 times repair same thing, + 30 Days vehicle in service).
If I was OP, I wouldnt even try to convince their significant other that car was fine. Given the used car market right now, I would likely get it back from tesla, and proceed to sell it to carvana / vroom etc, and would buy another tesla. The convincing I would attempt to do is that "it was a one off, and I got rid of that one, so we should be ok"
Thats what I would likely do, because she would never trust it again, and ANY little thing would turn into a "discussion" about how that specific car was a gremlin, lemon, etc etc. I have been married a long time (36 years) and know better than to go down that rabbit hole, lol.