Negotiating in Escrow. Need Advice!

[Lucas W. Emhof]

Hello!  I'm wondering what to do in regards to a situation i've encountered and how to handle it.  I am currently in escrow on a 4-unit property and am in the middle of the inspection contingency  period.  Following the inspection, due to some unforeseen problems I have counter-offered the asking price.  The inspection period ends this Friday, May 11th.  The seller is asking to give me a response by Monday the 14th at the latest after "crunching some numbers".  Should I play nice and allow her the extra time? Should I have the Purchase Agreement re-submitted to reflect the new dates?  Or should I ask that the current deadlines be honored and get an answer or reply by Friday.  Thank you!!!