Have a Friend who I met through DHs work. She's a bit older than me and we've been friends since just before my DD was born (DD is nearly 3).
I've met several of her family members, her mum and dad came to my wedding in 2016 and we've been to eat at each others family. I would consider her mum a friend too; I buy Christmas presents for her and her me and DD.
Summer 2016 my friend told me some medical information about her mum. She was having a tough time having lost her grandmother to the same medical issue so was concerned for her mum. Before Christmas 2016 she was told her mum as going to be fine. Friend of course shared this with me.
I treated this information with the strictest confidence as I would for any friend. I never even told my DH what she'd told me.
Friends mum has some how found out I know this information and is completely blanking me, I assume friend told her during a falling out that I know. The mum sent me a message through Facebook saying that I wasn't supposed to know the information and could I "forget it" I said I would and never mentioned it again.
The mum is now blanking DH and I. Friend has said she's still upset that I know. It's been nearly 6 months now and she still blanks me. DH has asked why but I can't tell him can I? Because I promised I'd not tell anyone.
I really want to make this right, but I don't know how. My friend told me out of concern for her mum, a shoulder to cry on. And I would never betray anyones trust by telling people stuff like this.
WWYD or say to the mum? Or do I just need to leave it until it blows over?