Sims 2 double deluxe, what does this thought bubble mean?

My sims are unable to sleep in the same bed, they are fully in love and are married but when the second sim goes to get in bed there's a thought bubble that has 2 or 3 "x"s and 2 footprints. Also, when i go to move or delete the bed it won't let me even though no one is planning to use it or even near it. Look at my picture to see it