she has messaged me two days in a row on FB!

I don't know what to say. But I keep awkwardly conversing anyway.

she done this before?

this is the first time I've talked to her in 22 years.

(see yesterday's plurk)

It’s nice that she’s reaching out, though, right?

yeah. I just, never had siblings. I grew up an only child, and don't really know what to do in this situation.

approach as you would meeting anyone new for the first time. She's a potential friend, and if you like her, great. If not, you aren't obligated to have her in your life.

she's nice and all so far, but I don't do well in the making new friends category.

and I don't have much to say about life right now.

It’s okay. She’s probably just as nervous as you are. See if you have any common interests or topics and break the ice that way.

her kids are grown now, but her oldest has two kids, so there's that. She's into the family genealogy like mom is, but I'm too impatient for all that.

Maybe she can give you the Executive Summary version