Should I divorce him?

My husband and I have such a good bond and I love him so much I am willing to leave him. I don’t know what to do. He has a daughter from a previous relationship who has made some pretty big allegations to several people in our family. She has accused my FIL of strangling her to the point where he wants nothing to do with her because he does not want to lose his nursing license. She has made up several other lies as well but in recent events she lied about my son who is 13 and accusing him of trying to get her to watch naked people with her. Totally fabricated. I don’t know why she lies like this but it has made me extremely uncomfortable to have her sleep over my house what so ever. I’m trying to protect my children and my husband for that matter because all it takes is for her to say something crazy and she can ruin somebody’s life. I have voiced my concerns to my husband and deep down I know he understands but he still wants her to sleep over from time to time and I just can’t be ok with that. I can’t say that I love her like my daughter. It’s terrible I know but she has caused so much chaos and she’s been in and out of our lives throughout our entire relationship so I do not have a bond with her and at this point I don’t really want one. My husband is hurting and it’s breaking my heart you guys! 😭 I just want him to be happy and he misses his daughter!!! So I sat him down with tears running down my face and I told him I think it’s best that I walk away so that he can be there for her as much as he wants. I just can’t take the chance of her lying and ruining my sons life. I’m so torn 😭😭😭 I love him with all my heart and I just want him to be happy. He told me that if I left him he would be crushed. And he is set against it. But I can’t accept her behavior and nothing gets done about it. My heart is crushed!! He says he will just be there for her from a distance and that does not suit rite with me either!! It kills me how much this is hurting him 😭 I don’t want to be the reason he’s not involved with her and her mother already picks and chooses when he can see her. He’s gone 4 months at a time without seeing her because of her mother. We also have a daughter together who is 1 so that makes things even harder. I really think I should leave you guys even though it will crush me. He’s literally the love of my life!!!!! But I love him so much that I’m willing to walk away so he can be more involved if the mother lets him. What do I do? I’m so torn 😞