My sister just woke up on the couch and started chewing on her blanket and it looked like she wasnt with it?

she then just started staring off into the distance she my dad then took her and put her on a chair and talked to her she muttered a few words but thats all and then she got lazy eyes and started coughing flem im as confused as she is if you could respond to this it would be a big help. o yeh after she just sat on the couch with lazy eyes and slow movements and just sat there wathing tv.