If you want my opinion I would take on a full time job and STOP doing teh house related work ... Hire someone to do it...

if you are committed to Full Time work too then he is in no position to expect you to do more than he is... AND you have your own income

He is still in the lurch for his % of expenses

To my mind if 80% of the household income is his then he is accountable for 80% of the expenses...