I doubt Motiben really wants Khiten to get married, as she didnt seem to be that close to Hiten (compared to Maulik) and Khemi is Santus "badjallan" sister, from Choti Jati... I am sure she is only saying this to make Santu feel guilty and leave DM, and if this happens, she will make new issues to stop Khemi marrying Hiten...