>Its been roughly a week since Toriel and Asgore got back together
>They aren't living together yet, but they still visit eachother and all that
>Frisk is out of town
>Undyne has no idea that the old goats are back together, and decides to visit Asgore since she knows he can get lonely. Especially when Frisk is gone
>She goes to the king's house, and knocks on the door
>No response
>She tries the handle and it's unlocked, so she helps herself
>As soon as she walks into the house she's greeted with the sound of the retired monarchs hardfucking in Asgore's room
>Undyne's shocked at first
>She didn't expect to hear Toriel moan out Asgore's name, at least not for a few decades
>She then gets giddy that her old goat mentor is out of his sad rut and whips out her phone
>Mashes out a message on the screen that would break under the sheer force of her fingers if it wasn't modified by Alphys
>Fufufufufus then leaves
>Asgore and Toriel are all snuggled up after their fun
>He's on his back and Toriel is snoozing next to him, her arms wrapped around him
>He looks over and sees that his phone has a notification
>Reaches over, doing his best not to wake up his lover
>He swipes the screen and his face goes immediately red
>"HELL YEAH! GET THAT GOAT TAIL FAM!"