He will probably just get angry again, which is what Aarti is thinking.
I can already imagine him thinking he betrayed Aarpita and he's going to ask her for forgiveness again because he's having a kid with another woman.
I feel so sad for Aarti, she believes she has to hide her pregnancy from her husband, because she thinks he will be unhappy and angry about it. No woman should feel like that.
I'm praying that the writers don't make Yash react so rashly again. It would ruin his character.