when do rhys and feyre sleep together

Rhysand and Feyre first sleep together in 'A Court of Mist and Fury', the second book in the 'A Court of Thorns and Roses' series by Sarah J. Maas. For the specific details, I recommend reading the book as the author has beautifully detailed their complex relationship throughout the series.

The intimate relationship between Rhysand and Feyre begins to develop during their time in the Night Court. Feyre starts to understand Rhysand better and begins to see him for who he really is. Rhysand, on his part, had already loved Feyre but waits until she understands her own feelings.

Yes, Feyre was indeed with Tamlin in the first book. However, in the second book, 'A Court of Mist and Fury', Feyre begins to see the flaws in her relationship with Tamlin and finds herself falling for Rhysand, resulting in them becoming mates.

Indeed, the relationships in 'A Court of Thorns and Roses' series are intricate. The author, Sarah J. Maas, does an excellent job of exploring the complexity and depth of romantic relationships.