Forwarding Work Item

Hi Experts,

My workflow is sending workitem to multiple users.

Both need to approve.Both are at the same level,so cant send to one and then other.What I am doing is,pass to all the users in a loop,one who makes the decision is removed from list and others are sent same item again.Now problem is when multiple users get the item , Say A and B.And if A frowards it to C,it will be gone from B's inbox also.Please let me know how to tackle that.Also when C executes it, I need to know who forwaded it to him.As I have to update some data for A also in the activity.

Reward point to be given for sure.

Thanks & Regards.