He didn't need to defend himself from others. In fact, defending himself only would've made him more suspicious. And Goddess of Wizards' scheme did not go as well as she planned, since God of Rogues wasn't yet called in front of the entire dozen of his siblings in divinity to explain his sins and plead for forgiveness.
No, thankfully.
But she did go and talk with the others, that snake, and some of said others didn't need much encouragement. Like God of Paladins, who paid God of Rogues a private visit full of vague threats and orders to "drop all unclean thoughts", or else.
Or Goddess of Clerics, who spoke the same things in a softer tone…
While God of Rogues could only smile and assure them he had no such thoughts and this is all the atmosphere of paranoia talking, and of course, of course, the mysterious culprit must've been an angel. They weren't always of the best sort in life. Why expect better from them after death?