HELP, Tenant threats

[Clare Cui]

First, let me say I made a mistake in not holding my standards with this tenant, I totally own my responsibility and it's a powerful learning lesson....

AND, I rented a non conforming bedroom, and the tenant wants to be released from the lease and is threatening to report not having a big enough egress window. I'm scared to death of getting a fined and absolutely livid that this tenant (that I was lenient with my rules with) is not turning on me. I'm obviously releasing her, but just GRRRRRR. 

Supportive advice only please.