One of my sisters is in a haram relationship and I don’t know whether I should meet the person or not and first of all to advise this is wrong (with wisdom) and also as they will most likely get married, for me to know if he is a good person. Of course this haram boils me but I will not act emotiona

Ustadh AbdulAziz al-Haqqan

I think your father should be responsible for this.