Do animals know?

Bailey • I love my beautiful girlfriend and can`t wait to have my baby in my arms :) <3
My cats never sleep in my room, Tonight they r both side by side at the foot of my bed. One has an attitude problem but was suprised to see she let me pet her. And the other fell asleep with her head on my arm and didn't leave like she usually would. Af is the 30th. Could this be a sign?