This definitely surprises her - Lola had made such a fuss about Letha being too young to be married and pregnant, she hadn't even considered the idea of... well. Lola having her own life.

"I.. assume your child didn't come with you, since I haven't seen them. Do you miss them?"

She assumes the child is either dead or being cared for by family, since... adoption doesn't really happen in Thornwell.