"Yeah She's A Whore"

I was reading the story about the Toulouse rugby player, Trevor Brennan, attacking a fan, the Guardian reports that:

One eyewitness yesterday claimed that Brennan, who runs a bar in Toulouse, reacted when fans began to chant that his pub was a load of rubbish. Toulouse contend that a section of Ulster fans was chanting: "Brennan, your mother is a whore," a version backed yesterday by the player's uncle, George Brennan.

[italics mine]
She might well be a whore but it seems like bad manners for the uncle to publicly back the claim.