You said : “However, it is definitely not the sign of sincerity for a person to repeat this wrong doing again.” Are you saying that this person cannot do tawbah ever again? Will he never be able to ask Allah for forgiveness? Will Allah, The Oft-Forgiving, never forgive this person?
We have commented on the sign of insincerity. The reality of the sincerity of a person is best known by Allah.
If the person is sincere, Allah will forgive the person.
and Allah Ta’ala Knows Best
Mufti Ebrahim Desai