My Insured may be liable?

I recieved a letter in the mail written with an Attorneys stamp at the top. I was involved in an incident in South Miami with my step-niece. She was highly intoxicated and verbally assaulting everyone that was on the porch of the condo we were staying in. She was asked several times to go to her room, to which she just ignored and continued the verbal assult. After the thrid time in my face screaming and swearing at me, I put my hand on her chest and slowly walked her backward to the door to enter the condo. I did not push, hit or hurt her in any way. She proceeded to start clawing at my eyes with her fingernails, and I simply moved her out of my way to avoid a fight. She managed to knock down a large ceramic vase that was empty except for some slimey liquid. The vase shattered upon impact of the porch, spilling the liquid everywhere. I was not intoxicated and I retained my balance. However, she managed to slip and fall into the middle of the smashed pieces, cutting her foot, extending to her achilles tendon, I believe. There was no police report made, or any type of report made. This was in Sept. 2012. I recieved a letter dated Jan. 17,2013 stating that my insured may be liable for this incident. They are requsting insurance information to complete "their" investigation, pursuant to Florida Statute 627.4137. It also states if my Insurance carrier discovers any facts which require an amendment to the foregoing statement, the statute requires the carrier to amend the statement immediately upon discovery. What are my rights as I was not at fault for her intoxicated behavior and circumstances from such behavior.

Very Kindly,

Leanne