I have an idea that may work. They both have cages right?
Well how about switching them in the cages, J goes into T & T into J cages. It'll force J to get use to T's smell, maybe even keep them in their cages longer & have the cages side by side during the day too.
The way I got my rat to like mice was that I rubbed the mouse all over my hands & held my rat (Mick could never bite me he was too loving) then I ran around outside so I could sweet alot & I took the mouse & rubbed the mouse all over my arms to get my smell ALL over the mouse.
I then introduced my rat to the mouse & Mike went in for the attack but he couldn't bite the mouse, it smelled just like me, so he started to lick the mouse & babied the mouse for the rest of the mouse life.

Its worth a try.

I just thought of this, what if u put J in her cage right in the middle of the room & let T run free? J could't bite T through the cage but would be able to see & smell T.