I hate to say it but if she leaves you'll be doing laundry separately anyway. Perhaps that can be a bit of a wakeup call. W and I have done ours separately for more than 15 years. If her stuff is in the machine when I do mine, I just move it. No big deal. She knows I do my wash on Saturday mornings and does her's whenever (You know I'm not really sure ...)
Mind you, I'm also the guy who loves doing the ironing. Nothing like a row of crisp shirts hanging to air to make a man feel like he's accomplished something important.
On BD H52, W50 T27, M26 S21, D23 BD-9-Mar-16 D-15-Jan-18 Final-19-Apr-18 I am a storyteller. The story may do you no good. But a story is never for the listener. It is always for the one who tells