“Akka ante amma kanna ekkuva. Amma istam tho istundi, akka lekapothe istundi.” (A sister is more than a mother. Mother gives willingly; sister gives even when she has nothing.)
In some informal or "street" Telugu contexts, "Kapuram" (meaning household/married life) might be used metaphorically: In-law Dynamics: akka tho kapuram high quality