Billing for services as member of an LLC

I am 50% member of an LLC in WA state. For almost three years, I have been carrying about 70-80% of the workload. My partner agrees with this analysis. Distributions have been 50% to each partner. I have also shared recurring monies with her at 50% (at her request) even though two thirds of the customers retained are mine. Can I bill the LLC for my disprportionate hours and the income that was paid to her from my side of the table? Thank you for any help you can offer.