Batman Arkham TG 2 (Patreon)

Grandma Parker: "Oh Batman don't you just look adorable. Finally done away with that brooding look. You couldn't look scary if you tried! And Robin, don't be taken aback by the advanced age. It just means you get to boss the Batman around for your life sentences."

Batman Parker: "We'll, gosh darnit, my voice! You haven't won! We'll tell everyone we're not Batman and Robin! Wait, I mean, we'll tell everyone we are the Parker's! No, how are...?

Grandma Parker: "Oh silly little Miss Parker, the serum we administered ensures that you can't tell anyone what happened here. Ta ta!