Sorry to pick up an old post, but is mom jealousy a "flavour" or a different path altogether? I'm assuming it's not the MC that feels jealous, from what I've played so far and read in this thread, that's not what this game is about.
What I'm concerned about is getting the content that will be the most satisfying. Do MOIR and MJEL points lead to a branching at some point, and if so, is the jealousy relationship with mom cruel, or does she also get kicks from it? Does either path block other possible paths for mom, like sub, dom or whore?