Sometimes an older women's pussy is dry and tight so it can be painful when having intercourse, especially with a large black man's penis. So, the stud should always use plenty of lube and be sure that the woman is properly dilated before inserting his big penis into her body. And, of course, be sure to cum deep in her as his seed will further help to lubricate her.
Not sure if that mature white wife was in pain or not from that BBC but I'm confident that, in the end, that black man came in the wife and lubricated her pussy by pumping his seed deep into her mature white body where it belonged and would do the most good.