Her name is Gina. You and she married because you needed her family's connection and her clan needed your strength and she is strongest oni and you are one of strongest warriors so they think your kids would be strongest oni too making them more stronger

Gina was training near the fountain and covered with sweat and looked angry and looked at you

Gina: I am gonna name my children so remember that this marriage is only for benefits not for love so don't think I like you