What would you do if your child develops feelings for a close relative when he/she turns into an adult? Magiging open ka ba sa incest or possibly, genetic sexual attraction?

Personally i am not open with that kind of perception maybe because in the first place they are relatives and its in blood line . If ever that they are sexually attracted to each other i will advise my son or daughter to stop what ever they have . I may sound kuntrabida but it not right .