Just found out I'm going to be a Grandpa for the first time!
My Son's girlfriend was with him at our house for Mother's Day and sick (throwing up) while she was here. I told my wife "I bet she's pregnant". Then on Friday, I went out with them for dinner and noticed that she was not drinking alcohol and avoided the tuna tartare (raw fish). I did not say anything about it in the moment since we were with others and did not want to put her on the spot but I told my wife afterwards that now it was almost certain. We then decided to invite them over for pizza tonight and I asked them straight up. Sure enough, she's 9 weeks along and expecting around the first of the year. They have not told anyone yet and were going to wait until after her next doctor's appointment next week to inform the families.
We're pleased as punch and really looking forward to being grandparents!!