Episode 39 of "Sex and the city"
s03e09 Easy Come, Easy Go

After Mr. Big confesses to Carrie that his relationship with Natasha is not going well, they return to their old ways, resulting in a night of passion. Charlotte realises her greatest goal in life when she and Trey become engaged, though it was she who had to pop the question. Samantha has a difficult time with Adam, her latest boyfriend. Miranda and Steve are still sharing an apartment even though they've broken up, and they find out that it's not easy living with a former partner, particularly if they want to date someone else.