Maternal incubation is a safe means of incubating your eggs.
Pros-
She will regulate both the temperature and humidity (upwards only for both, can't reduce them)
She won't be as stressed out if she incubates them
There is a high rate of success and it's cheap (you don't need to make/buy an incubator)
Cons-
The mother may not eat (I didn't even offer her food after she laid the eggs, and in total I think she stopped eating for 9 months)
If she does it may damage the eggs
Accidents happen and sometimes babies may not survive (the third snake which was a normal had its neck broken, which may have been from her reacting to me checking on her, no idea, but I had a corpse with a broken neck, which was depressing)