The way she had asked that as if they had been innocent enough would bring some form of doubt in his mind. Unless…
Thinking quickly, Johnny only needed to make an attempt to play this off as he spontaneously came up with an idea in order to try and play this out. It was bad enough that their memory had been altered or even regressed to a point that he hadn’t even met them yet.
“O-Oh! I’m uh, a friend of Gramma’s! I just came by to check on things on her behalf of course.” Whether he was crossing two clawed fingers behind his back or hoping that she wasn’t too aware of him coming off being suspicious.