Stephanie doesn't have lipfillers, just red lipstick, which makes her lips more prominent.
If she did have fillers they would look more plump.
She does look less wrinkly though imo on the cheeks. Maybe she stopped smoking. Or got a magic cream from India.
...
Stephanie seems to be taking a bit more interest in how she looks but to be honest I don't like whatever she has done to her face - the lip fillers aren't great and her eyes are becoming quite squinty. The haircut is very nice.