I Think My Sister Niki Masturbated After Seeing My Cock

A couple months ago I showed my sister Niki my cock, she just stared at it for a minute smiling until I put it back in my pants, she didn't say anything about it just acted like it didn't happen but a few minutes later she went in the bathroom and was in there for a long time, I think she was masturbating thinking about my 8 inch cock deep inside her.