heres my theory..
u kno how moti bain replaced DMs child wid hers (maulik) well tht child who died along wid santus parents
well the way khemi survived frm the bus going on the same route ... i think tht child mustve survived to ...... he mustve fallen out aswell just like her n brought up by sumone else
khemi mustve been found by him n she mustve have lost her memory...or the way creatives hav put it she still rmemebers it but maybe shes re-paying the guy for loooking after her .... in this case she mustve married hiten younger brother without hiten knowing she is ...
ahh i'm just confusing myself but there is a possibility haha =D
i kinda agrre wid yew btw ^^^^ =D