I was sexually molested by my grandfather when I was a child.

Answer

Maintaining a relationship with a shaitaan is haraam. It is not permissible for you to even make Salaam to this evil man nor is it permissible for you to respond to his Salaam. Observe strict purdah for him. He is worse than immoral strangers.

Evil, filth and immorality are the norm for Satanists with the type of perverted and deranged brains of this shaitaan who is your grandfather.

Women should be very wary of such mahrams who are fussaaq. Never trust a mahram who is not a strict observer of the Shariah. If, for example, your grandfather or uncle shaves their beards or do not observe purdah, then they should not be regarded as mahrams. Stay far from them. They are slaves of lust and of Iblees. Never be alone in the company of faasiq mahrams. They cannot be trusted.