Okay so here goes( a bit lengthy)
DH seems oblivious to SS12 manipulations. When I bring it up he makes excuses for SS12 and tells me he is a good kid.
The past few weekends and days he has been "forgetting" his bookbag(with homework) at BM house. DH gives lecture about how important homework is then does nothing but spends hundreds of dollars on the kid and lets him play videogames.
His grades are slipping. DH gives lecture but refers kid to me for privileges such as videogames.