Robert Pattinson
As if one wasn’t enough! Robert Pattinson is accusing former beau Kristen Stewart of another affair in the wake of their recent split following her cheating scandal coming to light.

‘Twilight’ costars Robert Pattinson and Kristen Stewart called it quits last month when it was revealed that Stewart had been having an affair with her “Snow White and The Huntsman’ director Rupert Sanders, who is married with two children.

Not surprisingly, Pattinson didn’t take the news well, with sources saying he was both “humiliated” and “heartbroken” in the wake of the affair.

Now that the couple is split, they’ve moved onto different homesteads. Pattinson is reportedly crashing with ‘Water for Elephants’ costar Reese Witherspoon, while Stewart has allegedly been staying with film producer Giovanni Agnelli.

Pattinson, however, has grown quickly suspicious of Agnelli. An insider told RadarOnline exclusively that Pattinson “knows Agnelli and has been calling him a lot since Kristen has been there.”

“He wants to know why Kristen is staying there at his house? He is super angry now and has accused Giovanni of sleeping with Kristen too."

“Giovanni got a call from Pattinson around four this morning, threatening him if he has been sleeping with Kristen," the source says.

"Rob is beside himself over Kristen's betrayal. No one has ever seen him like this."

Despite the shocking news, both Pattinson’s and Stewart’s careers seem to be moving forward with Pattinson have recently signed on for ‘The Rover’ and Stewart being confirmed for the lead in ‘Lie Down in Darkness.’