I doubt any boss would open an onlyfans link and if they tried I'd expect the company firewall would block it.
I could imangine a boss getting links to those videos on some other site that looks innocent [perhaps at home] but the boss is unlikely to do anything as those are what you do in private. The only exception would be if you work for a church where such is not allowed - and even then if it is a much younger you, you can rebent of your past sins.
the above is about work. If you were trying to marry the guy (who presumably isn't your boss as an ethics) it would be different some guys would not accebt that.