Yes, it is possible.

My sister recently told me about something our father did to her. I have no memory of any inappropriateness from him toward me, but I was a young child and she was a developed teenager.

It's made me wonder if something might have been done to me. But I'm just going to put that out of my mind.

I'm so sad to hear what she told me and our father died shortly thereafter and is not here to defend himself.