I told my mum when I was only about 4 weeks. We had gone to visit and she kept offering me food. Would you like eggs or bacon or macaroni or soup or or or...and I felt so sick that I had to go upstairs to get away from her! So I told her and she was over the moon. Second time ds told her mummy has a baby in her tummy at about 6 weeks. I can't keep a secret from my mum!
Gave my mum (and dad) and joint gift for mum's birthday implying it was tickets. Was a positive pregnancy test. We'd been trying for 20months so she was delighted. I was 14dpo and 2 days before my missed period (risky but was my first whiff of a BFP in 20 long hard months). LO now kicking me at 30+5 and it's been a LOOOOOOONG 30 weeks but really glad had mum all along.
With my first baby my mom guessed and so did my MIL....but both waited for us to announce it. With second and third I showed them the pregnancy tests....my MIL thought it was a thermometer so didn't know what we were showing her!! Enjoy the special moment of announcing it. It's such a special time for you all.