According to me, Ahaan is placed in Sonu's shoes.
Like the expectations placed on Sonu, his family too placed expectations on him to not compromise his values at all- sober or drunk.
Sonu was scared to tell anyone anything because of the burden of the world's expectations and that she'd get blamed because she's a girl, 'she shouldn't have gone to the party in the first place itself' ; while Ahaan hid the truth because he knew no-one would trust him, they all would make assumptions based on the first thing presented their way.
Sonu didn't tell the truth to anyone because she was scared of her marriage breaking, she knew how Sarla is; while Ahaan didn't confess anything because of his fear of losing Ishqi, he could lose anything and anyone but not his wife.
If you place him in Savitri's shoes- both have been accused of an external affair, accused of cheating on their partners. Interestingly, the catalyst to it being Dadi both times. Dadi's dislike for working women made her question Savitri's loyalty to her husband; while her incomprehensible hatred for Ishqi made her team up with the lady who's hellbent on ruining hergrandson- the grandson she so often claims to love the most in the world. Dadi has proved once again thatno-one matters to her. Family or not family- if their happiness causes her distress or a slight disturbance to her plan, she wouldn't mind cutting off the root of their happiness.