Design coworker keeps asking me for help with her freelance work. Advice?

I’m very annoyed.
I work as senior graphic designer, in-house. A couple months ago we hired a part-time junior graphic designer in a rushed process that I had little oversight or say-so in. She turned out to be a mess- doesn’t know even the basics of Illustrator/Photoshop and has a fundamental misunderstanding of what good design actually looks like. I’ve spoken my case with my marketing manager and HR manager- to no avail. I’ve got major student loans, so I’ve been doing my best to stomach the situation while I look for work elsewhere (which is the obvious answer to all my woes).
In the meantime- our company put on a dodgeball tournament that included a few of our local competitor companies. I don’t drink the work cult kool-aid and did not attend. My junior designer did. Apparently while everyone was there, one of our attending competitors was gushing about our great design work (all of my doing despite our junior designer and marketing manager doing their best to ruin the brand) to the owner of our company. Also, stating that they were looking for a contract freelance designer, and asked about hiring our designer to help them out. The work was offered to our junior designer.
Aside from being pissed and kicking myself for not being a joiner- I immediately knew she was going to be in wayyy over her head because she’s yet to complete a project here without asking me to hold her hand every goddamned step of the way about the most basic mundane easy shit I learned before I even went to school for design. Her first fucking project for this other company- guess who she’s asking for help already? Yours Truly.
What the fuck am I supposed to say to this bitch? I helped her the first time and I think she sensed I was annoyed, so now she’s been finding ways to ask me questions in a less obvious manner that later I’m finding out are freelance work related.

Great design resource

100 Things Every Designer Needs to Know About People (Voices That Matter) Submitted May 02, 2019 at 11:19PM by LillianCatbutt http://bit.ly/2IWLqIE