Some stores sell frozen fish. Is it permissible to buy and eat such fish?

To what extent can a woman look at the body of a non-mahram man without lustful intentions?

In what circumstances it is not forbidden for a woman to shake hands with a non-mahram man? In order to pay allegiance, can a woman kiss the hand of a man covered with a piece of cloth?

Recently a documentary showed chicken runs in Pakistan where blood, veins of animals and meat of animals not slaughtered according to sharia are given as food to chicken. It made people worry as to what is the ruling on consuming such chicken? Is it permissible or not?

Is it permissible for a virgin girl whose father and paternal grandfather are not alive to conclude a temporary marriage with a married man without presence of witnesses and without permission from her mother and brothers? Can the girl and the man recite the formula of temporary marriage themselves?

Two years ago my sister started a relationship with a married man. Under the pretext of saving her from depression, the man told her to consider him as her brother and trust him. My sister trusted him and told him all her problems. The man, claiming that we are like brother and sister, established a relationship with her and even kissed her. Now my sister is so much dependent on him that her life has gone out of order. On the other hand, she considers herself a sinful person. She wants to know if God forgives her after all this and what she needs to do to be forgiven. What should be done with that man?