I lie you!

Trying to get S to sleep for his nap. It's much past his usual naptime and I'm trying the usual reasons:
Me: "Sleep fast baby. அப்பதான் பார்க் போலாம். (Only then we can go to the park)".
S: His usual sing songs of "Mann ka radio. Bajne de zara" "Tsamina mina eh eh" and then when I started looking annoyed "I lie you" - this repeated in various tones - very plaintively.
For a while trying to figure this out and asking "என்னடா? புரியலே?" (What is it, I don't understand) and in my mind going through all the things I say to him which he of course picks up and repeats at appropriate times I realize my son is saying "I love you!". He's delighted of course that I have given up on putting him to sleep and am giggling uncontrollably and keeps on with "Because i lie you Amma!"