Married Registered Offender?

I am married to a man who goes to court on Sept 10 for a child molestitation case against his sister. We are already married with 5 children this happened suppousdely happened 7 years ago. If convicted, can he come home and live with us as a family unit? There is no physical evidence against my husband and it is her word against his. All she is saying he did was touch her. No ual , no of any kind.... just fondling. He is a stay at home daddy for 4 years now and if I ever thought that he was a offender I would not allow him around the children. Only one of them are biologically his. Please dont judge me and please give me advice. He has been offered a plea bargin of 4 years suspended 10 years probation and register as a offender and never be able to come home to his family. Please give me some helpful input on what to think and do. If this was true, why would his sister come to our wedding and have pics taken with her brother? Please help m