同床异梦，同床各梦
tóngchuáng-yìmèng,tóngchuáng-gèmèng
〖bestrangebed-fellowsdreamingdifferentdreams;hidedifferentpurposesbehindthesemblanceofaccord〗二人同眠一床,所梦之事各异。比喻相处共事中貌合而神离