akak engkau,abang engkau

I think people should hold someone very close to heart to admit her/him as their sister/brother when that particular someone really isn't (their sister/brother). But it seems that this sister/brother thing is somewhat inverted amongst the people I know ;p

"..'abang' kau tu tak datang ke?"
"..'akak' kau mana? Tak nampak pun?"
"..waaaa bukan main lagi dok sebelah 'abang' sampai tak nampak kiri kanan.."

Stressing the on words abang and akak when saying the sentences helps a lot in trying to understand what I'm trying to say.