Just a random question

If you were friends with a guy long before he got married and after he got married you remained friends but not as close. Never had sex never kissed never anything inappropriate...and his wife started calling you out the blue accusing you two of having an affair how would you handle that? I don't want to come between his marriage but at the same time I'm nt sleeping with him either. She doesn't want us to talk period, I think that's the issue.