Road Head and oral sex question

Do you keep sucking after he cums from blowjob? If you keep going, for roughly how long and how intense?

My boyfriend and I have been dating for almost 2 years now. We’re both in our mid-twenties and we were on a mini road trip.

I gave my boyfriend road head today, first experience for us both. He also has a hard time finishing with oral sex, never finishing prior with anybody, and I was on a mission to make it happen.

He came and I was unsure how much more to continue. Considering he was driving and it isn’t the safest activity in the world (luckily he’s great at multitasking and there was few people out today), I decided to give him just a few more, less aggressive, then decided to be done (he drove an extra couple of miles).

IYO, was this something I should have continued further? Was continuing for a few more seconds as a softer rate a good decision? Obviously he was surprised he even came at all.

Thanks for your input!