A father in law is a permanent mahram and is in the position of her father.

If he is saying or doing things that are not acceptable from a father to his daughter or if he is looking at her with desire or lust, she shouldn’t be with him alone and she should always be in hijab in front of him.

What sort of relation should the daughter-in-law have with her father-In-law? Some father-in -laws stare at the daughter-in-laws, they want her to sit in front of him, they comment on her facial looks, on her dressing etc