Translation of "granny" into Swahili

Throughout the evening, as I visited with family and friends, I often noticed our 10-year-old grandson, Porter, standing near my mother-in-law—his “granny.”

Jioni yote nilipokuwa nikiongea na familia na marafiki, kila mara niliona mjukuu wangu wa miaka 10, Porter, akisimama karibu na mama mkwe---“bibi” yake.