I was given a few of these last year and they have come up and are beautiful. I was told all about them by person who gave me the bulbs. She told me they spread out, and that’s why she had extra. She said they had a few names…Should I expect more?
What a wonderful gift that keeps giving!
Most likely, if your friend said that the Lily plants she gave you spread, then yes, you will probably get more year after year if you're treating them well.
Depending on the type of Lily it is, it may spread very slowly or very quickly. This article provides a basic list of "agressive" plants and how to control them if you need to: