I suspected it for many different reasons and bought an audio recorder and stuck it in her car - very first day of recording I got the shock of my life. I listened to it once and haven't been able to brin myself to listen to the 20 minute mobile call with him again.
I have only visited the hospital once with her. Unfortunately her mother has had advanced alzheimers for a year now and doesn't even know who I am. She just about recognises her daughter and son. Life can be real sh1t.
Thanks for your further comments Forever and Raymond - the support is much appreciated and is helping.