Saas Vs Bahu event - Pics

i kno this from the new reality show 'saas vs bahu' BUT i dnt understand half the 'relations' of saas and bahu in this reality show..i meen is this 'sahuna's' saas from 'santaan' i dnt think sooooo, tht meens she does some other drama and this women is her saas in tht, or mayb she was jst paired up with this saas cus they both wanted 2 b in the 'new reality show'