My mothers habit of leaving empty ice cube trays in the freezer bothers me. where does the apostrophe go in this sentence?

My mother's habit of leaving empty ice cube trays in the freezer bothers me.

Explanation:

If you didn't add the apostrophe, it would sound like you have more than one mother

martians or other types of aliens represent a unique fear as opposed to zombies. vampires and other types of monsters.   in most sci-fi stories, aliens come from other worlds and have different or more advanced technology.   abductions and experimentation on human bodies that involve these technologies, or the use of these technologies against human beings and the use of unknown "powers", are a type of fear that's different from that of other types of monsters.  

they both lost a woman they loved named lenore

they believed they interracted with a talking raven

they became orphaned at a young age.