Forward Work Item And Restart Workflow

My problem is that:

Requester: John

Manager: Peter

John shops a SC. when the workitem comes in Peter´s Inbox, he decided to Forward this Shopping Cart to Jonh again.

In this moment Peter can change the shopping cart and he has the button "Save".

When he saves, the SC is automatically approved!!!!! I would like that when the shopping cart back to John the workflow must restart... It is possible?

Thanks!