I think I cocked up

I (28m) got with my sister (29f) when I was 16. We have 5 kids, 3 sons and 2 daughters. <br><br>The problem is that my daughter is having a child with her half old brother and this has put them off having anything to do with me, as they now see me as their father. My sister is at a loss of what to do and we both fear that this could cause a family meltdown.<br><br>I hope I did not just dox myself.