may be they are cousins or something not sure..but i have the same Question in my mind.
they r cousin brothers ...SD mentioned it in 2days episode (UK) wen he introduced Suresh 2 Pallavi (classic moment ...wen she went 2 kiss him on the cheek as a greeting n Suresh moved away n did the paranam!) 😆
Suresh n Paravati have gr8 chemistry ...i hpe something comes abt their relation ...n if Nikhil is Suresh's son ...even better! ...becos it'll b like Pyaar Mein Twist with Nikhil voicing his opposition to the parent relationship 😛
...n yep ..Nikhil very definitely said 2 Parvati that his parents were dead ...just a ploy 2 get 1 over Parvati??! ...like father like son?! 😉