Will Allah accept the supplication, charity, seeking of forgiveness, and freeing of a slave by a disobedient son for his deceased mother, after he had always asked her for forgiveness?

The supplication of a child for his deceased mother, giving charity on her behalf, freeing slaves for her, and seeking forgiveness for her, are all matters whose rewards reach the deceased. The imams have agreed that these actions benefit the deceased. And if a person has repented with sincere repentance from the sin of disobeying parents, then "the one who repents from a sin is like one who has no sin."