This is something kinda similar to what my kids had asked our T. My 'mothers' birthday is coming up next week. T's birthday is late this month. My kids asked if we could celebrate her birthday early, and send her loving birthday cards that my mother would never appreciate. She was all for it. My kids have no problems coming up/out to her though and readily snuggle up with her.
I hope you, 8-year old tree, and T have a wonderful session.