Hey there all of you creative people; I need suggestions!

I need to make a thank you gift for one of the ladies at the bank. She was so helpful with all financial aspects of closing my mother in law's estate, and did not charge me a dime for it. She paid all of the bills, kept track of the estate finances and reported to the attorney, and even divided the estate at the end, which was today. I need to thank her somehow. I do not know her outside of our professional contacts. I have no idea what she likes or does not like. I don't know if she is married or has children. She is relatively young though. Any suggestions you might have would be greatly appreciated. Thank you!