Honestly, it could have worked as a sort off running joke that eventually went romantic route. Like: "Well, we cannot kill each other and doing this shit ain't getting us anywhere, plus we're kinda stuck here and I'm pretty sure my kids are either in Heaven/my husband took the kids. So, I dunno you wanna like try a fresh start", but: A. For this to work you need to have a passage of time going on through the series; B. You need to get the IMP's involved like again maybe as a running gag the country chick or the teacher are seen leaving the office or sending them voice messages with order's of how to try to kill the bitch.