在Not content with stealing my boyfriend (= not thinking that this was enough)中，我们阅读这一段文字时，先不看Not content with，先看stealing my boyfriend夺走了我的男朋友，再看Not content with不满足，说白了，就是用Not content with对stealing my boyfriend加以评论，对stealing my boyfriend行为发表看法，观点，不满足什么呢？就是不满足夺走了我的男朋友这一行为，这是从语义上看，从语法上看Not content with stealing my boyfriend作状语，从结构上看，Not content with stealing my boyfriend前省掉了she is:She is Not content with stealing my boyfriend。从表达修饰效果看,省掉了she is，当读者一开始读到Not content with stealing my boyfriend内心难免有一种悬念，谁不满足夺走了我的男朋友？后一句出现she has turned all my friends against me，原来是“她”，她这个人还挑起我所有的朋友和我作对。

Not content with stealing my boyfriend (= not thinking that this was enough) , she has turned all my friends against me.

=Not being content with stealing my boyfriend, she has turned all my friends against me.

=As she was not content with stealing my boyfriend, she has turned all my friends against me.

=Because she was not content with stealing my boyfriend, she has turned all my friends against me.

=Because of the fact that she was not content with stealing my boyfriend,she has turned all my friends against me.
=Due to/Owing to the fact that she was not content with stealing my boyfriend,she has turned all my friends against me.