Is it worth pursuing a lawsuit against Landry's in Kemah, TX if there is a slip and fall incident inside the restaurant? Broken ankle occurred while

Walking through a door. We were on our way outside to see the hostess to sit by the water. My sister was the 2nd person through the door when "nothing apparent" happened and she went down. FD, EMT's were called. We refused to go in an ambulance. I drove her to nearby facility, she ankle was broken in 3 places. She has to have surgery to put it all back together. The medical cost will be well over 10K.