It's So Nice to Have a Spouse Around the House - S5.E5

Serena is involved again. This time, Drarin takes her to the honeymoon spot where he and Samantha went. Samantha is at a Witches Council meeting and doesn't know what is going on. Darrin gets intimate with Serena, thinking that she is Samantha, and she tells him to back off. Then Tabitha is called to solve the puzzle.