Am I being dramatic? Coronavirus

My SO and I have been quarantining because of the virus, last minute today his sister asks to borrow his car to take a 6 hour trip to pick up her boyfriend from the airport (hes coming home for the weekend and both his sister and her bf have been exposed to many many people and not taking this seriously). Well she just crashed their other sister's car 2 weeks ago that she borrowed taking him back to the airport, so instead my SO offers her a ride. The governor of my state has said absolutely no unnecessary travel, we have 2 young kids and I'm immunocompromised so I did not agree with him going. He did it anyway. Am I overreacting for being upset ? Hes now mad at me for being upset with him about this.