Transmigrational incest, Avoiding subtle incest Options

It has been found during some of the hypnotic regressions that your present spouse was your parent some births back or sibling in past birth. It is not impossible to avoid such sinful incestuous relationships if we get ourselves regressed before starting an affair.

This is kind of what I wondered...Should my parents (who have been married 34 years) divorce if they found they were brother and sister 6 incarnations ago? I only think of incest as a genetic thing and it doesn't seem that is related to the idea presented here. Considering incarnations cross race and gender lines i don't see how it would be incest. Take for example if I was a chinese farmer in 1200b.c. and my girlfriend was my sister at that time and now I am a caucasian bookstore worker and she is an asian women's studies student...how does this create an incestual relationship since we carry no shared D.N.A. and neither of us recognize our past lives experiences? I have always felt that incest is no doubt a bad idea as it causes problems with the children created (mutations, etc..) but I never really saw a karmic argument in it.