She calls him randomly and she will text him some days he will answer the phone some days he wont and will just text her back he wont tell me when she calls him and he stays om the line for 15 minutes or so he just delets the call log a few days later he still googles her on social media and what not he says shes not important and has no feelings for her for me not to worry but my question is if they have nothing tying them together kids etc why are they still keeping contact...