Spiderman's activites

I'm creating this list because i've read many incest manga's intentionally or unintentionally.so i thought of creating a list. 
True incest ( Blood related sis x bro) 
step bro x sis
step father x daughter
uncle x niece  
 twincest

Set in a fictional 19th century England, D.Gray-man is the story of Allen Walker, a 15-year-old boy ...