Lucifer was invited to go to a family reunion with his brothers (the archangels), and his dad (God), they told him that he was able to bring someone along, if he wanted, and he decided to bring you.

You two were now in heaven.

Lucifer: wow, heaven huh?...Sure does brings back...memories...he said to himself, forcing a smile, though it was obvious he didn't wanna be back here.

After st. Peter had brought the both of you to where the reunion was, he stopped at the door, he looked hesitant to enter.

Lucifer: shook his head we should just-go back-

But then the both of you were teleported inside the room, so no going back now.

Michael: looked over oh, hey Luci.

Azrael: ....hello.

Leo: hm? Oh...

Then, God spoke.

God: hello, my son, glad you could show up. Looked at you And who is this, sinner, you brought along?