Hi all , I have a stepson of 15 yes old but only been with his father for 5 yrs. We each also have older children so I'm use to.patenting and they are no bother the relationships as a blended family is great. 

My issue is since being around my step son for this time I've come to notice many behaviours  . I have of course spoken to my partner , the elder siblings if his and good friends about this situation .