First off you have to calm down. Tell your boyfriend you need a week of breathing space. I find it odd that you wouldn't be suspicious re his behavior regarding incest. Usually people who have incest relationships are odd about having sex with a normal mate. These are very serious allegations he is making. Could it be he is afraid to get married and making this all up? There are a couple of things you can do here. #1 You can go and talk to his mother. Be calm! Yelling will get you nowhere. Tell her what her son told you. If it's true you'll soon know, and if not, then you know he's lying to get out of marrying you. Either way, you win! #2 You can take him at his word and walk away. If all this is true (he's not lying to you) then you don't want to start off your marriage with all this garbage tied to his butt. If he lied about it you still don't want to marry him because you'll never take him at his word again. Marriage isn't all roses and it takes honesty, loyalty and a whole lot of work. There are good times and bad, so you sure want to start out on an honest step and some maturity on both your parts to begin a marriage. Good luck hon Marcy
Incest
No, it is considered incest and is illegal.
She was taken to trial as a traitor to the king as well as incest with her brother. Found guilty and beheaded.
The answer is contained in the question. The crime is INCEST.
Incest.
A relationship that is perceived to be exploitative or coercive in nature may be abusive, manipulative, or unequal in power dynamics. This type of relationship may involve one party taking advantage of the other for personal gain, control, or dominance. It is important to recognize and address such toxic relationships to ensure the well-being and autonomy of all involved.
A kin relationship is that of people who only have sexual intercourse with the purpose of either producing offspring or pure pleasure. Often times, this has a negative connotation as it is used with blood relatives and the unfounded hatred of "incest." Incest is perfectly natural and healthy, so a kin relationship between, say, a mother and son is perfectly fine.
The marriages you describe are incestuous; the offspring of incest are called inbred.
No. Consenting or not, it's still incest, and that's NOT legal.
At one time in English law marrying your sister-in-law was considered to be incest. At other times, among the aristocracy it was rather common. The practice no longer is considered to be incest and is not illegal, as long as the original marriage creating the sister-in-law relationship is no longer in force. There is no specific term in the English language for a man who has married his sister-in-law.
A brother can't marry a sister it's against the law, but you can marry your 2nd cousin and down.
There is no such thing as incestry. However, it would not be incest if you married your second cousin.