Haha, no, I've never heard anything so ridiculous in my life! The baby is made up of 1 sperm and 1 egg, the sperm from him,a dn him alone, and the egg from you, and you alone. So the baby will look partly like you and partly like him. Every person has 46 chromosomes, 23 from the and 23 from the father. 22 chromosomes from each are informational - eye colour, hair colour, height, skin colour, arms, legs, you get the idea, and 1 chromosome from each is a sex determination chromosome. A mother will only pass an X chromosome on to her baby, so all eggs are girls. The Dad will either pass an X or a Y chromosome on to the baby, they have boy and girl sperm. If a boy sperm gets to the girl egg, the baby is a boy, or has one X and one Y chromosome as well as 22 information chromosomes from the mother and 22 informational chromosomes from the father, making 46 chromosomes altogether. If a girl sperm gets to the egg, then the baby will have two X sex chromosomes plus the 44 informational chromosomes (22 from Dad, 22 from Mum). There is no way that any part of his wife can climb into your partners balls and infuse itself either with your egg or with his sperm. And marriage is nothing but a long term relationship with a written contract, there's nothing about mingling of DNA in my marriage contract! As for leaving his wife for you, if he hasn't done it already, Honey, I think you're seriously deluding yourself. Prepare yourself for a very VERY long time of living life as 'the other woman', or his 'bit on the side'. If he needs you around, it's because his wife has a lower libido than he does, and he's low enough to look elsewhere for a bit of fun.