Will started staying over after the two of them started getting better acquainted with each other. So it was only natural that Lance decided to make breakfast for them one day.
Only to find it wouldn't be a surprise as William was standing in the doorway.
The two of them are and talked for a while and things would go along smoothly from there.

Thank you to  Nexus for the art of my rabbit and  Kyo316 for using William.
We didn't exactly plan for the two of them to get together, but things happened and now their dynamic just works