@TheEmojiFormerlyKnownAsPrince
That the medium/the medium's parent/relative had known your Mum and, at best, she wanted to reassure/comfort you.
I've had people look shocked and ask 'how could you know that? You must have - The Gift'. Nope. I'm good at reading body language, though - whether you look anxious, sad, in pain, if you've just walked back into a place after I saw you leave it and are casting your eyes around for something, it's likely to be a jumper or scarf left under the table, if you're looking really anxious and keep on putting your hands on each pocket, it's keys or wallet - that kind of thing. And I will notice dog/cat hair on your tights and a perfect jumper, so I know you've been clothes shopping recently or you've looked at a dog walking past and sighed, suggesting you miss having a dog - that kind of thing.
The one who asked me in a shaky voice if I did readings after I'd directed her son towards the pale lemon cardigan under the table, insisting she could pay made me feel good and bad about myself though - I looked at her twisting her battered wedding ring, took a deep breath and said 'He's fine. You don't need to keep asking him'.
She looked so happy. She still tried to pay me - in the end, I told her to give it to charity or buy some bulbs with it. I meant flowers - Tulips, Daffodils, that kind of thing. She gasped and said 'OH! The kitchen light blew this morning! You're AMAZING!'.
If there's money changing hands, it's fake.