Hi,
Please relay this to your step mom... because there are repeated dreams and there are so many snakes, I don't believe it's stress related. I think more likely than not she needs to have more sex and more regularly and the dreams will stop. Sounds like her kundalini is unbalanced. The rotting corpses are nothing to worry about if that is the case. Extra sex really does usually help resolve minor kundalini issues. I hope it's ok to post this here. Anyway, that is my advice in her particular case.
Blessings, Love & Light,
Skydancer