The Doctor goes to visit River at the library after his regeneration.
"Hi honey I’m home"
River turns to a different yet very familiar voice that she never thought she’d here again. When she sees the face the “and what sort of time to you call this” gets caught in her throat but she just manages to choke it out.
She then slowly walks over to her husband and says “oh, you’ve matured, there’s some fun for us to have there” and then whispers “Spoilers” right into his ear sending a chill down his back.
He takes the hint pulls her right in close and says slowly “So you’ve you’ve already seen this face”
She replies breathlessly “It still surprises me.”