IS THIS POSSIBLE?????cat purring?

The other night i went to bed, im not sleeping great so i was reading a book in bed, when all of a suddern i could hear a cat purring, i sat up and looked around the room and could still hear it, anyhow i must of fell asleep not long after, and forgotton about it, then last night, i went to bed again, was about 2 am, and i was reading again, when i became aware of the purring sound again, i got up and went into the hall, to listen more , but it seemed to be coming from my bedroom, my son was awake, so i asked him to come into my room to listen, he did and he also heard this, just out of curiosity??????????is it possible for animals to visit spiritualy?. As we do not have a cat.
much love and light.
xxxkezxxx.