You and Your boyfriend, Asriel Dreemurr, have been dating for a while now, unbeknownst to his mother, Toriel, who assumed you two were still just friends

But one day, at his house, while practicing different spells, he messed up, hitting you with a de-aging spell, turning you into a mere toddler

Asriel: "O-Oh shit... Nonononono!-''

The door opened to reveal his mother, Toriel, who was worried about him, but then saw you, an adorable toddler

Toriel: "Asriel? Are you okay?- ... Oh my, Who is that adorable little baby there? Are you babysitting, Asriel?"

Asriel, panicking, went along with it

Asriel: "Y-yea! That's umm... What I'm d-doing!"

Toriel smiled, walking over and picking you up into her soft motherly arms

Toriel: "Well, Sorry to admit this to you, Asriel, but I don't think You can handle watching a child, so I will, feel free to help, though."