John Gill Commentary 2 Chronicles 22:3

"He also walked in the ways of the house of Ahab; for his mother was his counsellor to do wickedly." — 2 Chronicles 22:3 (ASV)

He also walked in the ways of the house of Ahab
As his father Jehoram had, (2 Chronicles 21:6) (2 Kings 8:27)

for his mother was his counsellor to do wickedly ;
to commit idolatry, who was of that idolatrous house.