In Bengali culture, a refers to the sister of one's sibling-in-law (or the female in-law relative of the same generation). The relationship between a Biyai (male) and Biyain (female) is traditionally defined by "Misti Dushtu" —lighthearted, witty flirting and playful banter.
Are you planning a or looking for more details on the film plot featuring Ferdous? In Bengali culture, a refers to the sister
: The story usually unfolds during a vibrant Bengali wedding ceremony. The groom’s brother (Ferdous) meets the bride’s sister for the first time amidst a riot of colors and music. In Bengali culture