According to the information you provided and the current actual situation, you don't have to worry. Don't always take the eight-character information to heart, in fact, it may not be true. As long as you husband and wife love each other, my concubine will not appear.
Solution: You can always say in front of your husband that "my concubine" is doing something for you, such as I pour you tea, wash clothes, and so on, and that's "OK". He will love you all his life.
May you grow old together! Happy life!