Excuse me for asking the obvious, are you splitting up or staying together? If the money's in the same marital pot, why would you need to change anything,? Partner/director/co-owner, its all the same, the income/outgoings will be down to the company, just let her run whatever side of the window cleaning business she wants to, her way. You do your thing and let her do hers ??
If you are splitting up well you need a lawyer and an accountant.