Praise be to Allaah.
In the answer to your first question (no.
96614) we stated that whatever of this money is still in your possession
should be spent on charitable causes, and you should not make use of it. In
that question we referred to another question, which says that is it
permissible for the penitent to make use of some of the haram money if he is
in need. See question no. 78289.
Undoubtedly one of the ways of doing good is
helping the one who wants to get married so that he can remain chaste. Based
on this, there is nothing wrong with giving this money or some of it to your
relative who is going to get married.
This is not regarded as charity or zakaah on
your part, rather it is ridding yourself of haraam wealth. As for charity
and zakaah, they can only be given from halaal wealth, because Allaah is
Good and does not accept anything but that which is good.
We ask Allaah to help you and guide you.
And Allaah knows best.