I stumbled on this site while searching for answers and thought you all might have some input. I have a SD14 and DH46 who have an emotionally incestuous relationship best described as a "surrogate spouse" scenario.  Have any of you experienced this and if so do you have any advice? I have three children of my own (all adults) and have never seen such blurred boundaries between parent/child roles. He treats her as a partner instead of as his child. Thanks in advance.