Hello mam,I am from Hyderabad, age 28 doing software job in hitesh city, am not married at my parents are forcing me to marry my unts son (who is my father's sister's son) but I heard that which is not correct as per science which leads some complications for child's health, please mam give me some advise on this issue which will be vary helpful for me.Please suggest Is beneficial or It will effect our children.