How long before my landlord should return my security deposit?

I moved out of my apartment May 24th and still have not recieved my security deposit. My lease says the landlord shall return the security deposit in “reasonable time.” As I understand it, her husband is an attorney therefore the lease is very secure. Anyway, I (and my roomates) have contacted her several times already. She responded the first time stating that the checks would be mailed the week of June 11th. She lives in Texas so I gave it more than enough time to arrive (over a week) and it still hadn’t come. I then emailed her again and she said that she had just recieved our last water bill and she would send the checks along with copies of the water bill after processing that. (For our last water bill, which gets sent to her, she deducts the amount of the bill from our sec. deposit which was agreed upon at a previous time). Anyway, that was almost three weeks ago. It seems that she keeps making excuses, is there anything I can do because contacting her is not working.
I forgot to mention I am a college student living in a college town in new york. My landlord lives in texas and we have had nothing but problems with her since we moved in.
I just emailed her again and she apologized for the delay stating she has been out of town. she said she will mail the check tomorrow. 🙂 hopefully she’s sincere this time.