"Hey there, Greg! John, ah, your father asked me to come by and ask you where your mother was."
Gregory looks at you blankly for awhile, then informs you:
"John's not my Daddy. My Mommy told me yesterday that the man she was seeing years ago is my Daddy."
Good Heavens! So Sharly DID sleep with Grant when she was seeing him on the sly back in 1990.
Hmmm. From the way Greg's looking at you, it's obvious he's expecting some sort of remark. Depending on your approach, Gregory would probably open up to you and tell you where Sharlene is.
You:
(1) Praise Grant
(2) Castigate Grant