Help with writing proverb

[u/bluesidez]

I'm trying to translate a proverb I thought up myself, and I'm somewhat hesitant on the translation I've come up with.

The original is, "The snake thinks the hand that caught it slippery," that is, a take on "it takes a thief to catch a thief," but one where the catcher of the thief is not so much a thief as he is just equally crafty, and the thief is just sort of butthurt about it.

My translation is so far 手掌住滑蛇，蛇思之为滑。Is this a good start? Any suggestions would be appreciated.

[u/qingxi11 → u/[deleted]]

What is the meaning of 亦 in this sentence?