Who is more disgusting and more to blame, the cheater or the trashy sibling?

If your spouse (partner or husband/wife) cheats with your own brother or sister, who is more disgusting and more to blame?

Your spouse or your sibling?

My spouse
My brother/sister
Other
Select gender and age to cast your vote:
Who is more disgusting and more to blame, the cheater or the trashy sibling?
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