The Paradox of the Night Court
Tamlin describes the Night Court as a haven for Feyre. Ironically, Feyre considers the Night Court a hell on earth. The more Feyre lives in the Night Court, her post-trauma syndrome worsens. Additionally, Tamlin makes Feyre's life at the Night Court worse because he is overprotective and controlling.
The reconciliation
When Feyre returns to the Night Court to reconcile with Tamlin, he believes her. Ironically, Feyre is faking the reconciliation because she wants to spy on him to get information about the impending war between King Hybern and other kingdoms. Tamlin does everything to ensure Feyre's comfort at the Night Court, but she does not love him because she is there for a purpose.
Conditional love
The romance between Feyre and Rhysand is conditional, but she believes he loves her passionately. When Feyre compares Rhysand to Tamlin, she finds him respectful, caring and concerned. However, Rhysand is fulfilling the contract between him and Feyre that requires her to spend seven days monthly with him at the Spring Court. Consequently, it is a paradox for Feyre to think that Rhysand will marry her because she forgets their love is conditional.