False Accusation Threat - Canada

My ex boyfriend got charged with physical and sexual abuse allegations by his wife in summer this year. As we were dating at that time, I bailed him and brought him to my house due to court orders that he needs to live with his surety. During those 2 months, we had good and bad times. After we broke up, I became friends with his wife. When he got to know that he became furious and threatened to put false sexual allegations against me by saying "this will teach you a lesson" he said I forced him to get physical which is totally absurd.

I need advice on what should I do next? He is already an accused and his trial is next year.

Should I get a lawyer! I don't have his messages or call records where he is saying any of this though. I haven't contacted him for few weeks now