Collaboration is always a good idea, especially with Sunday, who is such a talented musician. You and she will get popular and produce an amazing piece of music art. No reason to deny her offer!
Weave your chords in her songs Valentine, Marx, Madness, and BI NB to see the result. But your tones perfectly support each other, so you already know the outcome will be great. Sunday sings like a princess, but care for your part in the track. Don’t fail the verse, or you will need to record the game again.