Now that friend is back home, I went to DH and said "Wow, Nance and I really got mistaken for relatives a lot more this year than when I went to visit her in Iowa last year. Now that you've seen her in action and seen us together, what is it? Similar looks? The way we interact? Do we sound alike?"
He said we definitely do look related, and said sometimes we acted like mother and daughter, sometimes we acted like sisters. He also said that yes, our voices do sound very similar.
On our way back from OC on Tuesday, we drove through Salisbury and stopped by HQ of his company and got to meet his coworkers. (He's a field engineer and only sees coworkers about 2-3 times a year) Then this morning one of them called him and I overheard him laughing and saying "Yeah, I know. They look alike, they talk alike, but believe it or not, they're not related!" When he got off the phone he said it was one of the guys from HQ who thought Nance was his mother-in-law! Though when we went through the office, DH did keep saying "I brought the family in!" without making the distinction that the tall blue eyed redhead was not actually related to us but family in another way.