Incest and taboo is a common occurance nowadays.
It is most commonly seen when a girl is forced to marry her cousin or her brother sometimes, in most cultures it all depends on who they chose for you in the family.
In rare cases would you see incest happening between a mother and her children, in my opinion i would consider that out of hand and illegal because a woman cannot give birth to her child and in turn get married to him again.
Well some people do not think like i do because it has already happened, a proud mother posted on facebook that she had a child with her 15 years old son and their daughter has grown up to 10 years old.
The mother’s post reads :
“I had a child with my 15 years old son and our daughter is now 10 years old”