I don't know if it helps, but my DH's CO parenting time is every Saturday-Tuesday, close to 50/50 split. Granted, every other weekend BM gets kids until 4pm on Saturday, so she does get some weekend time, where as your schedule would keep her from having any weekend. Would the children's mother have a problem with not seeing them on the weekends, I mean would she even be open for 40/60 or 50/50? And one more suggestion, maybe every other Saturday she could get them for a few hours, if she did want weekend time. Just a thought. Is there a court order of parenting time in place right now?