Someone e-mailed it to me...I think it's called Absent Parent Reversal or something like that...there was a link also in the e-mail but I didn't save it. I was very startled reading about this scenario because I initially felt it may possibly be what I was going through with my fiance and her ex (there were many parallels to our situation). She said that there was no possibility of this ever happening so I didn't push for us keeping a visitation log or anything like that.