I have a fiancee and she’s currently

I have a fiancee and she’s currently pregnant for me of which I am taking full responsibility of. Though we have had our ups and downs which I can’t go into details. The issue now is that I brought my younger brother, actually our last born of 11 years old and recently I found out that this my fiancee that is pregnant for me has been having $ x with my little brother anytime I’m not at home. I mounted a camera and she discovered it and behaved herself thoroughout that day. I finally called her attention and she denied it though I slapt her. Later I called my little brother and he told me everything,that my fiancee use to rub his pen !$ nd remove his p@ nts and ask him to lie down on her nd he will put his pen !$ inside her just like that. I decided to send her away but Later this morning she confessed to me that is was true and I forgave her. I went to send money to my brother using pos before I came back she has met that my little brother and asked him to tell me that he said everything out of fear and that nothing happened between them. Now I was cautioning both of them this night and she now told me that she discussed with my brother and my brother said nothing happened that it was out of fear he said those things. I now asked her, what about the one u confessed to me? She said she said those things because she’s afraid that I will send her out that the truth is that they didn’t do anything, even my little brother is now saying that he was afraid that yesterday that’s why he said those things, she just p0is0 ned his mind. I don’t just know where to start with. Please I need ur mature advice. I’m taking good care of this lady, God has been good to me, we don’t lack food.