Yes, mental harassment is constituted by any act which forces a person into depression, hypertension, suicidal thoughts, etc. There may or may not be any events of coercion, physical assault or sexual assault. Mental harassment may be caused by disrespect, abusive language, ignorance, financial abuse or torture, and so on. A combination of the events may reflect which law applies over mental harassment by the husband. For example, it may be cruelty under section 498A including violence and/ or dowry demand. It could be a case of section 354 IPC as well for outraging the modesty of a woman. Otherwise, the law on domestic violence also recognizes mental harassment. Thus, it depends upon what actually happened to finalize the law for mental harassment by the husband.