Unfair treatment of the co-owner of the property

I have my sister's situation at the momemnt,the eatate agent advertsied and aold the houae unver the husband instruction,the house is now sold but the wife was never part of the deal,yet during the viewing of the house,the wife told the estate agent that ahe is not aelling the house,and ahe wven told them she has an ongoing legal cases between her and the husband,the situation is that now the people who nought a house are here wanting to move in whilst the wife and the hildrwn are occupying the house,the estate agent went ahead and sold the house knowingly of the situation,the emotional ahuse to the children that is going on here,it is something else,The estate agents name is Shuaib Seedat,the estate agent is working Pam Golding in Brakpan,How unearthical is this from.an agent knowing very well the TCF outcomes,the xompny name is Pam Golding.