Can heated scented wax harm my unborn baby??

Amanda • I`m going through a separation. I have a 5 yr old. Had one ectopic pregnancy back in December. Pregnant with baby #2!!
I ask because my mom is always using the cinnamon wax that u put into a tray like thing and its heated by a bulb and once it melts. It's super strong and it irritates me.. Anyone know if just the smell is safe !?