Has anyone ever dated someone and then dated their sibling?

Has anyone ever dated someone and then dated their sibling?

There’s this one show called The Summer I Turned Pretty. The main character Belly dates one brother and moves on to the other. To me the plot seems super unrealistic, but I never knew anyone that did that in real life. Im curious though if that has actually happened to anyone in the real world.

Has anyone ever dated someone and then dated their sibling?
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