Your Mum, to whom you posted the cardigan you knitted for your Grandma, loves it much that your Dad is concerned that she won't give it to Grandma*!
And here, because I have no photos of Grandma's cardigan, is a totally random photo of some lovely oranges from a colleague's backyard tree.
*there is exaggeration here. My Mum loves my Grandma so much that if Grandma liked a sweater I had made for Mum there would be a reasonable chance she would give it to her. There's no way Mum will keep the cardigan. The fact that Dad reckons the look on her face said she wanted to its pretty good validation though!