thank sir for the meaning...of that word...
I guess the story writer wants sathya and Mugs to see swetha as two different persons...rather stwo isters...so sister #1 is Sathya's wife and Sister #2 is Mug's wife...so sathya can call Mugs as sagalai...
ayo kadavuleh...avar yeadho kooppittuttu pogattum paa...naama edhukku muttikanum modhikanum...he he he he