Headcanon
Odin has his own chambers and Frigga has her own chambers. But Odin generally sleeps with Frigga in the queen’s chambers, the place where the royal children are officially made (although of course Loki wasn’t conceived there, and the Allparents are pretty sure that Thor was conceived in a pavilion).
When Loki arrived in Asgard, Frigga convinced Odin (and herself) that he shouldn’t sleep in the nursery with the nursemaid (as Thor had done until then) because she might find out that he’s a Frost Giant. So for a number of years, Frigga slept in the nursery with her sons.
When Frigga moved back into the queen’s chambers, Odin was very happy. . . But he quickly realised that little Loki came very often to sleep with his mother.
(This actually wasn’t bad for the Allparents’ relationship. They creatively found places and snatches of time and this kept things from becoming routine.)
