She was probably right about not dating Will during that time period. Think of all the stories about coworkers on movie and tv sets smashing and then the problems that arose because of it. Hell they cancelled the long running series Castle because rumor was the two leads were smashing and then had a big break up and couldn’t stand being around each other.
Same thing on Game Of Thrones. Dude who played Tyrion’s rapscallion body guard was dating the chick who played Cersei, then they fell out and couldn’t be around each other to the point they couldn’t film any scenes together.
Will Smith and Karyn Parsons spent SIX YEARS together. And in those six years she already saw one long term cast member lose their job supposedly because of a feud with Will Smith. And not only that, with all the fine females they set him up with on the show, I REFUSE to believe Will ain’t run through a few of them. Her dating Will woulda been toxic as fukk on that set.