Hot sex with exes mates

Brad and I were together three years and split ten months ago. In our last year we experimented sexually and one night made a sex film. 
It wasn’t unplanned so I had spent time having my hair styled, getting waxed, manicure etc, and picking out sexy lingerie and heels. Without being arrogant I did look good and felt both confident and sexy. 
The first five minutes was me showing off my outfit and body and then giving Brad a slow BJ before he went down on me and then we fucked in numerous positions before he finally came over my breasts. 
A couple of months after we broke up I was out with the girls in a club and one of Brads mates, slightly drunk, came over to say hello. He was telling me how sexy I was and how great my body was when it clicked - Brad had shown him the film. I asked him directly and he grinned before admitting Brad had played it after a drinking session to him and two other guys. 
I was angry but intrigued. So you thought I was sexy I asked. He looked at me and said you’re the hottest girl I’ve ever seen and if I was Brad I’d never have let you go. Turned on I asked would you fuck me and he went quiet and just nodded before asking if I was serious. I realised I was and we left saying goodbye to the girls.
I didn’t know if it was because of the film, or he was Brads friend, but the sex was hot. I heard myself urging him on and went fucked all night. 
Over the last four months I’ve repeated this with the other two guys and the sex has been just as hot. The last guy, Josh, surprised me with his thick eight inches and we’ve been fucking every week since. He’s just asked me to be his girlfriend and I’ve said yes. Should I tell him about his mates though? Maybe I should tell Brad too?