OET interlinear 2 CHR 21:13

uW Translation Notes:

Note 1 topic: figures-of-speech / metaphor

(Occurrence 0) act like a prostitute

(Some words not found in UHB: and,you_have_walked in,the_way_of kings_of Yisrael and,you_have_made_prostitute_[themselves] DOM Yehuda and=DOM inhabitants_of Yerushalayim as,made_[them]_prostitute_[themselves] house_of ʼAḩʼāⱱ and=also DOM brothers_of,your house_of your_father_of,your (the),good more,than_you killed )

Jehoram caused the people to serve idols instead of Yahweh. People who serve other gods in order to receive something from them are spoken of as spiritual prostitutes. See how you translated a similar phrase in 2 Chronicles 21:11. Alternate translation: [leave Yahweh and serve other gods, as a prostitute serves men who are not her husband]

Note 2 topic: figures-of-speech / metonymy

(Occurrence 0) the house of Ahab

(Some words not found in UHB: and,you_have_walked in,the_way_of kings_of Yisrael and,you_have_made_prostitute_[themselves] DOM Yehuda and=DOM inhabitants_of Yerushalayim as,made_[them]_prostitute_[themselves] house_of ʼAḩʼāⱱ and=also DOM brothers_of,your house_of your_father_of,your (the),good more,than_you killed )

The word “house” is a metonym for the family that lives in the house. In this case it refers to the descendants of Ahab. See how you translated this in 2 Chronicles 21:6. Alternate translation: [the descendants of Ahab]