Programmatically Add values to Request Object

I have this particular scenario -


 Page1  POST --> Page2 POST --> Page3.


Page1 (html) collects data from a customer and sends this data to Page2 (aspx). Page2 sends this data as XML to another site using WebRequest POST. I need to add the result (in a 'status' variable) of this WebRequest POST (200 OK or failure) to the Request Collections object that I have received from Page1 and send the consolidated set to Page3 for processing. I know that the Request.Forms collection is readonly and hence cannot add this status variable in Page2. Is there any other way that I can have the Forms collection to have this new value (in addition to the values that i have received from Page1)?. I only have access to Page1 and Page2, not Page3.


 I thought of a solution (haven't implemented it yet), but it is convoluted. ...