What is the halacha lmeisa if a couple is makpid not to do chibuk vnishuk on a yom havest sheino kavua, should they also be makpid not to sleep in the same bed? (What about a vest kavua?)
Sleeping in the same bed is no less than chibbuk v’nishuk, and according to some poskim it is worse. Part of the reason is because it is for a prolonged period See sources.
Shulchan Aruch Horav Y:D 184-6, Kuntres Acharon-1, Pri Tahara 184-3, Ben Ish Chai 2 Tzav-2, Shiurei Shevet Halevi Y:D 184 -4 D:G V’hinei,