I dont think its fishy.. I think its just Rk being his obnoxious sarcastic self. RK is not expressive- he isnt the sort of guy who whispers ILU every morning or night. This doesnt mean he doesnt love Madhu but rather he shows his love through actions and isnt very expressive. I think it was a clever subtle touch to his character... I think RK says ILU in rare occassions which actually makes his ILU very precious.. It didnt bother. I actually loved this lil scene- 😃