OnDelete Event Receiver delete associated item

I have 2 lists. List A creates a record in List B on the creation of a record in List A. So, I'd like to complete the circle by deleting the the item in List B when the record is deleted in List A.

The relation is as follows:

List A
---------
EmpName (Person Field)
txtEmpName (Single line of text)


List B
---------
Emp (Lookup on txtEmpName)

In an OOB workflow or via list web service I can usually get the list item ID from the value of the look up field value. I am trying to do this from an Event Receiver but I get the raw text value. See below:

using (web) 
{
     SPList list = web.Lists["List B"];

       foreach (SPListItem item in list.Items) 
       {
          //item["emp"] = "1;#Joe Smith"
          if ((int)item["emp"] == properties.ListItemId) 
          { 
               item["OnDeletingOutcome"] = "This Item should be deleted";
               item.Update();
          }
        }
 }