1. I can imagine Om giving Ish a chance to explain but she has none. They are standing in the rain and under the umbrella she's holding. He gets upset and walks away getting himself wet while Ishana watches him walk away helpessly. (Ish is wearing the same dress she did when she gave the fake kangan to Om)
2. Om witnessing Ish getting hurt by Gunde and resuing her but refuses to talk to her. So just drops her home and comes back to mansion. He being observant he noticed the pain in her eyes and paints that.