I got a phone call last night from my dad's assisted living informing me that a nurse had observed him and another resident having consensual sex when the nurse stopped by his apartment on her rounds. I was very uncertain how to respond. I confirmed that it was consensual and then said "Well, at over 100 years old I'm just glad that he's able to have sex and enjoy himself." The nurse was quite taken aback and then I asked if there was something she expected me to do. She said no, that they were just obligated to tell me. My question is should I be concerned (I don't think so) or should I talk about this with my father (I don't think so) or what do I do with this information besides try to put the picture out of my mind?