To know no bounds means to be without limit or restriction, and in this context the speaker's passion is without limit.
Context: Well, your passion certainly seems to have no limits, she smiled, kissing him, but you must admit its strange.
Hypothesis: Well, your passion certainly seems to know no bounds, she smiled, kissing him, but you must admit its strange.

Given this context, determine if the hypothesis is true (Yes, no, or unknown)?