Saying it

Bit of a weird situation, I guess, but here's what's up. I've seen similar stuff here, so I thought I'd give it a shot.
The woman of my dreams - we dated very briefly - is now with one of my friends, who I work with. It's a classic case of "my best friend's girl" sort of thing, and everyone knows it. They're also not shy about showing off in public.
As a cuck, I know he's twice the man I am. And they both seem to want to tell me about it, although we haven't talked yet. Basically, I want to be a sub cuckold and allow this - I think that's the best spot for me, is looking on jealously. There's so much cuckold angst there, thinking about them together. I want to tell her I'm glad she's with a real man and they should, basically, feel free to kind of rub it in. How do you phrase that lol?

For once in your life, pretend to be a real man, and just come out with it. Ask her in what way can you serve them.

Yes I will. I'll be sure to be very submissive about it. It'll be embarrassing, but it is my place and I want to serve them.

He keeps wanting to talk to me about it, so maybe I will tell him the same - they should feel free to be as open about it as possible, and I will do my best to serve them as a cuck should.