2001 Ford Escape Brake line

I brought my auto into the garage on Feb 18th, to have the brakes and rotors done. and then on Feb 27th, a little over a week later. I got into my auto to go to work, and the brake pedal went right to the floor. I took the vehicle to the same garage the next day, and they told me that i needed some new brake lines. My question is this. Was there anything they could have done during the original repair, to cause the brake lines to go bad? Just seems that it was such a short time between the two events, for it not to be connected in sopme way.

Thank you for any response,

Mark