Spousal support is generally not affected by the spouse's employment or living situation (except that sometimes it is set up to reduce or be eliminated if the spouse remarries), and similarly is generally not affected by incarceration. The support generally continues if the spouse is earning more or earning less, is living in a cheap location or expensive one, if able to work or is not able to work. While there is no harm in petitioning the court for a reduction or early termination, in my experience, this is not a factor that will result in a favorable modification.