I'd ask myself the following questions:
-How uncomfortable is my spouse? Why? If my wife was still very uncomfortable then we'd need to discuss what would make her comfortable.
-Have I tracked our detailed spending over >1 yr to know for sure what my expenses where going to be?
-Would I want to take this job if there wasn't a pay raise? or if there wasn't pay at all?
-What would I want to do with my free time if money wasn't a factor? IE what am I "retiring" to?
-How old am I and what major changes could happen in my life (kid(s), college, housing, length of retirement, medical, elderly parents who need my help, etc)? This to think through how important an incremental 15% of my 'stache would be and to see if I missed anything in planning future expenses.
Depending on how I would answer thoses questions would dictate if I took the job. Notice that the extra money is pretty low on the list.