If this man actually takes the clinic Mauli has gifted him now, then it will prove that this man has literally no self-respect & shame in accepting & using something gifted from his ex-wife who he cheated while she was busy fulfilling his dreams.
And it would be charity from Mauli's side which he will accept & use for his profession to earn money for himself & his pure juzzbati Nandini.
If this man has iota of any self-esteem & emotions other than pyaar ke pavitra juzzbat, then he should be returning the keys of this clinic to Mauli.
Otherwise he is just a big loser.