For being a wild woman, Aela seems to dislike any Hearthfire homes.
However her moving there is no surprise.
My orc was married to Ghorbash and they lived in Lakeview, a hearthfire home. She adopted Sofia and had her live at Hjerim in Windhelm. Well guess who just showed up? Ghorbash. No big deal but since he is also the steward for Lakeview, he goes missing from time to time.