The mom saying "dealing with" didn't even catch my attention until seeing it pointed out and quite negatively.
It may be considered hood speak now, but I remember my grandmother using "dealing with" all of the time, for pretty much everything 40 years ago. My mom and aunts picked it up from her. I just had a conversation with my son who is 23 and he remembers my mom and even me using it. I can assure you there was never any hint of anything negative in the usage. We were among some of the most over protective mothers out there.
We were so bad that my son claims my mom had "nananoia" and I still have "mommanoia". Even now he knows to call not text because anybody could send the text at least once every 24 hours, to keep my mommanoia in check.
Funny part my grandmother was a home ec teacher. Worst part my mom was an English teacher.
While it's possible it could be a hood/drug thing, it could very well have been picked up from family speak.
What's sending me all over the walls with this case is the extra few hours of sleep they managed to get, after having dealt with her all night, feeding and putting her back to bed and with a toddler in the house.
The only way the toddler slept in late was if she too was up late (all night). Otherwise she would have been on the couch, crawling around, pulling at hands/arms, bouncing, or my darling's favorite way to wake momma up pushing eyelids back with tiny hands.