She loves me a lot and really want to marry me. She does not want to leave me. Sex is not my priority but she says that it is must to make our relationship strong. I also love her and we think it is not lust.
I dont know if the law would marry you two cause this is considered incest
but it depends on what country you live in too. In some countries this type of marriage is acceptable but why do you like having sex with your own biological mother this is just wrong and unacceptable in the United States of America but than again you dont mention what country you are from i dont know what to think most countries like UK, Australia , this is not accpetable behavior of two grown adults but i am not putting you down if you live in a country in which this is acceptable and allowed than i apologize for jumping to conclusions
i really don't care if you want marry you mother it wouldn't effect me. but in america just having sex with your mother is illegal. even when using a condom. i really don't know why people let this stuff bother them. the bible says as long as your married sex is ok but if you two are getting married just to have sex that's the same as adultery in my opinion. plus i don't read the bible much. i know if she wants to get pregnant with you than there are going to be risks of birth defects for the baby. but i really don't care if you marry your mother. i've had dreams about being with my cousin a few times and i do think my aunt is very beautiful. but think about the age difference. i think this is just lust that'll pass over time and you'll want to be with someone closer to your age.