Frasier - Season 6 Episode 16
Decoys

Devastated by Daphnes blossoming relationship with Donny, Niles plans for a Crane Boys vacation to his newly acquired (from Maris in the divorce settlement) cabin. Upon learning Roz is still pining for Donny, Niles invites both Roz and Donny to the cabin, hoping to split up Daphne and Donny. When Frasier and Martin arrive earlier than expected, Niles and Roz are forced to pretend to be lovebirds to protect their scheme.