To be fair, we don't know if she was a sociopath. A sociopath is someone who either can't feel guilt or does so to such a diminished degree that the cases where they do feel guilt are almost negligent. I agree she did a monstrous thing and deserves more than 15 months (bolding this because I know some people might conveniently not see this sentence). But, if it's true she was dealing with depression and other mental health issues, those could affect her view of suicide. I've struggled with depression as long as I can remember and, at my worst, I could genuinely understand why suicide would be considered the only option. Now, I'd never have tried to convince anyone else to commit suicide and if I knew someone was contemplating it, I would have reported it. But I could see how those might cloud her thinking; the mere fact that she badgered him into committing suicide doesn't means she's a sociopath. Maybe she genuinely believed he was better off. However, the problem is of course that sociopaths are excellent liars so she could have faked guilt to make the judge believe her reasoning was inhibited by her mental health.