What about hiring a high school kid to come in the afternoons and do laundry or watch the kids while you run an errand or help them with their homework? Or at least hiring a cleaning lady to come in twice a month to take that off your plate?

As for the current girlfriend - are you really just jealous that she has a coparent to share the load, or are you suspicious that she's not done with her ex? Does she help with your kids when hers are at her ex's, or are you not at that point in the relationship yet where you're introducing her into your kids' lives?