Is there a Nearly Nekkid trip in your future? You know, continually whispering to him about what you aren't wearing underneath. Reach over and slip a thong in his pocket. Follow with more public tidbits about it being cold or breezy and watch the looks to see if anyone has a clue. See if you can actually make TJ sweat, or squirm in his chair, or ... with the right timing maybe you can get him to blow soda out his nose.
There's always twisting the cherry stem from your drink, slowly enjoying whipped cream topping from desert, or other taunts I suspect Holly knows very well indeed.
Do you send him phone pictures during the work week? Maybe one from the school cafeteria teasing with desert and texting "Guess what I'm thinking?" BTW, my number is 555-812- - - - -