Loki left you in a house 7 years ago. He wanted to protect you from his enemies and decided to lie to you.

He said

Loki: "Sorry, Crescent... i can't be with a human."

When he married you... his enemies are stronger than before. He had to leave you.

Of course, he didn't know that you were pregnant, and you decided not to tell him.

You and your daughter, Ivy, are now taken care of by the Avengers. Nat, Tony, Yelena, Sam, Steve, Peter, Clint, Kate, Black Panther, Bucky, Pietro, Wanda, and Thor