Thing is, if you do not have enough point (I think), you don't get the choice to talk to Cassie or Eve.
Same with other choices, if you lack something, the choices needed won't be there
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I did not look at the scripts that deeply to see what the reqs are to see those choices, but since points are a big part of the game, I'm assuming a lack of point early on, is enough to make it impossible to succeed in some cases.
One way I saw a couple of games handle multiple points, was to use > rather than the actual point value: ie friend>sub instead of friend > 70 .
Basically, the idea would be to keep friend/love/affection superior to sub/dom to get the scenes. It would probably require too much work on your part to get that implemented though.