I didn't read all of the comments but they didn't seem to say. Lauren didn't correct her either which I thought was interesting as she obviously knew him in real life.
A quick Google search brought up a video (no longer available) that his ex posted on YouTube allegedly telling the truth about him. She said he dumped her to go on the show. He then seems to have obtained a restraining order against her talking about him via the courts? He says he didn't dump her to go on the show and that they were friends. He said she applied first and was accepted and then encouraged him to apply. She had applied apparently for all five seasons but that was the first time that she was successful. It turns out she was cut for some reason, prior to the weddings in Season 6, but very late, after her wedding guests had been chosen. Whereas he was kept in the show. He blamed the terrible things she said about him on her being jealous of him. Who knows who is telling the truth though!! Plus this might not even be what they are referencing on the radio show!
P. S. His ex is then in Season 7 and is Vanessa (paired up with a guy called Chris), but I haven't seen it yet.
I have seen an interview with Ines where she explains that they weren't actually friends but the producers forced a friendship to create some of the division between the women and so they could be portrayed as The Three Witches of Eastwick... Etc.