"I am sleeping in my bed."

Translation: Śpię w moim łóżku.

[bluthbanana87]

'Moim' is locative 'mój'?

[Emwue]

Yes, „w” requires locative here, so „moim łóżku”.

[elevy23]

I thought locative "moj" for neuter nouns was mojej?

[Jellei]

No, that's for feminine. moja (Nom.) --> mojej (Loc.)

[Iryna773366]

Why not swoim? It's her own bed!

[Jellei]

Oversight, added.

But in 1st person, the 'normal' possessive also sounds natural. "Śpię w moim łóżku" sounds perfectly fine to me, but then "Ty śpisz w twoim łóżku" isn't that great, it really should be "swoim".