This story just sucks. Here's my take on it;
Horny girl (Lily) receives attention and ditches her lifelong companion (Anna) within half an hour of meeting evil woman (Rose). She's insatiably horny. Meanwhile, her lifelong companion suffers endlessly as the horny girl indulges with the evil woman. Lifelong companion is forced to watch and listen to their escapades. Horny girl only care about herself and does not care how lifelong companion feels. The story concludes with the lifelong companion still in suffering, as horny girl leaves her for the evil woman. That's the gist of this terribly written NTR story.
Honestly, unless you're a die-hard fan of cuckold porn, this isn't for you. The plot lacks depth, and the characters are shallow, existing merely to facilitate the porn scenes.