It's hard to give specific examples...

Mostly I guess it would be my reflecting things back at her for comic effect - like one time she used capitals to emphasise particular words in an email, so in my reply I did the same thing but in a way that was really goofy...

Sometimes I'll reflect therapeutic tools/techniques back to her but with a cynical twist...

Sometimes I make out like she's a tyrant or a tough taskmaster - and not just toward me...

I play on it if she ever forgets to hug me...

I'll play on her forgetting anything..

I'll make like her motives are different/deeper than what they were...

I once accused her of voodoo...

I don't think a lot of it would make sense to anyone else without giving a lot of context..

ETA: T does seem to find it all in good fun Sometimes she will tease me, too.. (carefully! She knows I can be sensitive..)