To take the plunge means to commit oneself to a course of action that is momentous or challenging, but in this context she is suggesting not to go ahead with it and avoid taking the risk
Context: If you still feel the same way about him when the time comes to sign the lease, then do not go ahead with it and avoid taking the risk.
Hypothesis: If you still feel the same away about him when the time comes to sign the lease, then take the plunge.”

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