The wiki says she send brigands after you if you go into her cellar and leave, but I did no such thing. When I first visited her, I spoke to her, harvested some vegetables, looked around her house (but took nothing) and then I left. I headed back to Riverwood, and started learning how to smith from the Blacksmith. After a little time passed, suddendly a group of hired brigands (3) show up and surprise attack me (I didn't even have my weapon equipped). After killing them, I looted their bodies and found a contract from Anise, saying that she was hiring them to "teach (my character's name) a lesson for being a theif. I was like, wth, all I did was take from her garden and she wasn't hostile towards me after that, so ....I guess....dont steal from her garden either? I was pissed so I went back to her shack and killed the old hag.