1.he started of fake game of pregnancy and shielded himself behind her. Arzoo in the name of friendship takes up the blame.
2.sahir who always thought of Arzoo as pure was bound to doubt her when even insisting her to speak up she keeps mum and blames Sahir of not reading her eyes. I mean seriously you expect a guy to read you through when you have hardly spent time. She forgot that she is working with Sahir as professional not personal.
3.where was the boldness of zaki, ready to speak the truth to Sahir at point when Sahir started doubting. One question here... Suppose some one comes and stays with you as distant relative and he/she is good, nice etc. You will start trusting from core and will not doubt?
4.i guess it's zaki's obsessed behaviour who is being selfish and always asking for Arzoo. I doubt zaki's hidden intentions as he keeps asking for Arzoo without realising what his brother and family is going through crisis. He is least bothered about anyone.