Mom (MIL) age 80 Has Alzheimer's/ dementia Cancer with Psych issues. Recently within the last 2 months has begun inappropriate behaviors with her son, my husband. He has begun to lock bathroom doors because she will just walk in on him without even knocking even though she has her OWN bathroom and seldom uses ours. Tonight he was showering to go to work and locked the bathroom door, she watched him take a towel and work clothes to the shower. She jumped, as well as she could, to chase him in to the bathroom and got very upset he had locked the door. She came into my room and demanded me to tell him to unlock that door because she wanted to go in there with him. I told her that it was inappropriate for her to want to shower with her son and if she needed to take a shower I would be happy to help her in the morning. this is twice now within a week. The last time she grabbed his butt at the kitchen sink then giggled like a school girl with a crush. Is this due to her Alzheimer's? Dementia or Psych issues? She takes meds for all 3. How do I approach this behavior to correct it ?