OK be careful qualifying her pulling his hair to show him how it feels as "abuse". When kids cross certain lines then I believe corporal punishment is the answer. Parents that tolerate their kids hitting them, biting them, pulling their hair, etc are doing themselves, their child, and society a huge disservice. Sometimes a good old spanking is what is called for. And that our society claims that it is abuse is idiotic.
He pulled her hair, so she pulled his to show him that having your pulled is not fun.
Also, kids acting out when they are with one parent, or their grandparents, is a relatively normal thing. I know my D through the years has come home and acted pretty bad after being with grandparents. I think it is sometimes just rebellion since the rules are different at your house than they are at hers and vice-versa. Or it could be his way of dealing with his parents being split up.
M(53), W(54),D(19) M-23, T-25 Bomb Drop - Dec.23, 2017 Ring and Piecing since March 2018
