Robert Pattinson's sisters Lizzy and Victoria Pattinson, hate Kristen Stewart

Robert Pattinson's older sisters Lizzy and Victoria Pattinson are reportedly threatening to kill the hunk if he gets back together with Kristen Stewart.

A source tells Radar Online: "Robert's sisters were fuming with Kristen for hurting their brother in the way she did.

"They've told him that there's no way he can take Kristen back after what she did to him."

The insider added: "It's a case of once she's cheated, what's to stop her doing it again, and Lizzy and Victoria are pretty unforgiving over Kristen's actions."

Robert is considering a return to London following the breakup.