Have you thought about not taking her up on her offers to stay overnight? Perhaps you shouldn't stay overnight this time and tell her that you think the upcoming three days will be a lot of time together and giving a little space beforehand would be a good idea.
Your W can anticipate the weekend while she's alone. She'll be looking forward to seeing you.
I like your tiptoe/eggshell comments. Eggshells: bad. Tiptoeing: good.
Me: 42/H: 37 T: 10 years/M: 8 D9, S8 Bomb: 7.23.07 Separated: 1.20.08 D Final 3.19.09 Affair started in '05, found out parts in 11/07. They married 11.26.09