Yes a hug was of a thankful brother .. but why did he kiss her on the forehead
Because he was emotionally overwhelmed by what happened and forehead kisses mean affection, friendship which is okay. But not in the direction this will go, considering Abhira was surprised and blushing. She may not take it that way is what they are showing.
And Rooh-i may be jealous, but to hide it, this is exactly what she will tell Armaan on that bench it seems. Ki don't lead her on, kuch aur na samajhle. She is young and a woman.
Bubbli pookie pie has a lot of growing up to do. Heartbreak serves the purpose.
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