Has anyone mistakenly thought you were dating a relative?

The picture is a screenshot from a local store's website in their FAQ section. It got me wondering, has anyone ever jumped to the conclusion that a family member was your partner?

Perhaps you were just having a drink with your daughter, or perhaps your brother picks you up from work, or they've just seen you with a cousin and jumped to conclusions.
Has anyone mistakenly thought you were dating a relative?
Has anyone mistakenly thought you were dating a relative?
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