I'm trying to remember a name to a fanfiction that I read a long time ago. It was when Kagome was living in this nice condo and Sesshomaru just happened to move in as well. Him and kagome kind of start seeing each other but the catch is Kagome can't say anything to him other wise the game is over and they won't see each other anymore. But when sesshomaru learns that she work in his company they really start dating afterwards. But then sesshomaru leaves to go to America for awhile and when he comes back Kagome had a kid, just to find out it was his.

I think that's this...

Speaking Without Words by sesshou_lover
*Nominated for best romance* Every day since the mysterious stranger moved into her building Kagome has ridden in the elevator with him. They never speak. She doesn't know his name, but she knows there's something that drives her to be with him. When the chance to explore a new world arrives she takes it, never realizing that her nice and simple world was about to get complicated.
Rating: MA