Why will a guy reveal his ex friend's sex life publicly and how many men she slept with?

-hes married for 4 years with a 3yr kid.

he disclosed a few relationships of his frnds when asked about them but nobody asked him abt his colleague and he thrashed her by revealing the men she slept with,10 of them and who she is in bed with now and praised his wife.later he had to apologize forcibly.why is he soo interested???\why does he care?were they having an affair???to throw out his feelings without thinking and to embrass her also Plz answer my question when u get a chance the one about the scratch ticketI go to church with a girl who knows. Ill text and follow up.
CUZ HES A ****** DICK!!!! THAT HAS NO RESPECT