Start working on this tomorrow night. This will be a long weekend, so this new schedule will help her as she prepares for school. Your husband needs to be able to sleep in his own bed. No going back once you start this
Let her know that you that she is now old enough to sleep in her own bed, alone.
We used to keep a really tight schedule when school was in session, so that her body would prepare itself for sleep. I really tried not to run errands or have appointments after school, so that her schedule was the same. Of course once she was older, she was fine with changes to this schedule.
She would come home, have a nice snack, then she had a choice, she could work on her Homework right away, or she could play or watch 1 TV show.
This worked for our child, for some children, this will not work, so you set it up the way that works best for your child. Then she was allowed to play outside until dinner was ready. Sometimes she would want to help with dinner and that was fine.
When my husband got home. we shut off the TV and had dinner. A quiet dinner, No phone calls, no TV. we enjoyed our visit and then if she needed more time to work on a project or finish up homework she would do that. Then she would have a bath. A nice quiet bath. Pajamas and then we would read books to her. Sometimes she would read the first book and then we would take over. The secret to story time is to read in a low voice and not to engage her by asking questions or being too animated.
Here in Austin, at this time of year, it does not begin to get dark until almost 9:00 pm. I used to hang up quilts to cover her windows, and I always made sure her room was cooled down and her CD player was playing quiet music so that she could not hear the neighborhood sounds.
This helped so that she was not aware that maybe the neighbors were outside.
This usually all relaxed her a calmed her so she was ready for her goodnight kiss and then lights out.
As she got older, by about 4th grade, she was staying up to read on her own. She would ask for "10 more minutes more" or "1 more chapter"..
At this point I made her a deal. She could stay awake reading as late as she wanted, BUT she had to get up in the morning and ready for school on time, with no whining, or we would then be setting her bedtime.
Honestly, we NEVER had a problem with this, because she knew I would not back down on this. She learned very quickly how much sleep she needed.
When she was young, she would sometimes say she was not tired or was scared. She had dream coins for under her pillow to keep the bad dreams away,
Or we would let her make a "nest in her bed. She would gather pillows and blankets, books, toys, whatever she wanted, sometimes, I would ask her if she wanted to sleep with her feet facing the headboard. Or maybe sleeping in her Sleeping bag on top of her bed or on the floor. She loved having these options when she wanted something a little different.