The Rude Lady

So today I had the entire medium lane to myself. I swim at the YMCA on Steuart Street down by the Embarcadero. Usually the pool is crowded with health nuts and overly in-shape guys strutting their stuff wearing nothing but a Speedo and a smile. And then there's me. I do what I can, and I actually feel like I'm a good swimmer, but I guess that's all relative to whoever you're swimming with. But anyways, I was getting in my 1300M today and I was just finishing up my last little lap when a lady plopped into my lane. I didn't mind because I knew I was getting out of the pool. When I got to the end, I wanted to say something to her that was friendly and to let her know there was no need to share the lane since I was getting out. So I said to her, "That was perfect timing. I'm finished so the lane's all yours." And the lady looks back at me with a smirk and retorts, "Well, I really doubt the ownership is yours to bestow," and then she took off swimming. I'm really glad that she was fat and unattractive or that really could have scarred me. I'll just blow it off as ugly people being rude to attractive people such as myself. Your comments are greatly appreciated in this matter. Was what I said rude in any way?