Delusions after stroke

My wife (32) gave birth on Nov 6th to our son. On Nov 17 she suffered a stroke and was airlifted to hospital for surgery to remove half her skull. She is home now but thinks that i had an affair with her best friend. She tries to argue with me constantly and wants to leave me. Friends and family have told her its not true, ive let her go through every app on my phone to see im not hiding anything but no matter what we do she believes it to be true. Im going to set up an appt with a psychologist but was wondering if anyone had any experiences like this? Any advice would be GREATLY APPRECIATED. Thank you.