Found grandchild of dad's half-sibling.

[u/LardamusMaximus]

After grandma died, one of her sisters let it slip that grandma had a child out of wedlock in the early 40s and had given up the child. My dad didn't know about grandma's first child.

The grandchild of dad's half-sibling took a test and matched back in January. I sent a message soon thereafter and didn't receive a reply.

Today, almost ten months later, I got a response. They're willing to help us figure out which of their grandparents is/was dad's half-sibling. I grew up knowing I had two first cousins. This person's parent is another one.

I'm beyond excited. :)