This is one of the reasons that 23andme has warnings about dna matching to relatives https://theconversation.com/what-are-the-chances-that-your-dad-isnt-your-f

This is one of the reasons that 23andme has warnings about dna matching to relatives https://theconversation.com/what-are-the-chances-that-your-dad-isnt-your-father-24802 https://theconversation.com/what-are-the-chances-that-your-d...