[zozbot234]

> consistently remind that if they have a boundary they are free to enforce and you will respect that.

The clearest and most effective way of doing this is to proactively establish and propose safe boundaries for the other person's benefit. This is the underlying dynamic behind many rules-of-thumb of ordinary courtesy and politeness (often wrongly dismissed as some sort of useless, obsolete 'traditionalism'). Not everyone is so assertive and comfortable with themselves that they should be expected to verbalize their boundaries to you, or even to understand them proactively.