Meanings of set firmer in English

You need to set firmer boundaries if he isn't listening to you.

She tells Louise Holden that it's time for parents to set firmer boundaries.

ANSWER: If you feel taken advantage of, it sounds like you'll need to set firmer boundaries with her.

A spasm crossed his face, but his mouth set firmer and he disengaged her clinging hands with relentless fingers.

This may mean setting firmer boundaries with your friends about how you spend your time, the behaviour you engage with and your friendship with them.