Okay I have to say I have just had the strangest night with my running club

A Couple I know hinted at the idea of mining rights to my person, saying I could be the sprouts auntie 

I am a logical person by nature and thought over their request, Basically asking me to have a child by a man I have nothing against but no attraction to and his wife a sweet woman would do the baking..... Wouldn't I still be Mommy Genetically?