Touching one's sister or brother's wife with lust

Q:

1.If someone touched his brother's wife with lust. Will this break his brother's marriage with his wife? Are their children/grandchildren, etc. allowed to marry each others?

2. If someone touched his own sister with lust. Will this break his sisters marriage with her husband? Are their children/grandchildren, etc. allowed to marry each others?

A:

1. No.

Yes.

2. No.
Yes.

And Allah Ta'ala (الله تعالى) knows best.

 

Answered by:

Mufti Ebrahim Salejee (Isipingo Beach)