Express.js and cluster response callback

Im a bit new to Node.js so I have a question about handling response in express.js

Lets say I have a cluster with master and 2 workers. In worker I get a request and I call master to get me a status update

In worker I have

router.get('/status/:file', function(req, res) {
   process.send({ status: req.params.file});
});

it lands in master fork part

var worker = cluster.fork();
worker.on('message', function(msg) {
      if (msg.status) {
        //check the queue... do something and send it back to worker
        worker.send({ status: true});
      }
});

so worker catches that in

process.on('message', function(msg) {
   if (msg.status) {
     // How do I reference response here??
     res.send ({status:msg.status})
   }
});

So how do i keep reference to original res from router?

Can I do anonymous function, add callback to res or something else?