What to do with an overtly exasperating colleague in CS?

I am working my Undergraduate research project in a HPCC. Whoever does programming knows this is a "teach-yourself" skill. Everytime a problem arises, you search the wealth of tutorials and guides in internet, you ask in an specialized forum and the last resource is to consult a colleague (everybody is very occupied with its own business). Few weeks ago, a new MSc candidate entered our lab and was assigned a sit next to me. She seems unable to go beyond very basic commands like executing a for loop in a BASH script. We helped during the first weeks but she is making no progress. I myself handed her down a couple of tutorials and scripts. What exasperates us is that the more frustrated she gets the more she starts mumbling expecting that someone will approach and solve the problem for her, not to mention that she interrupts every five minutes asking the same question we have answered several times. We spoke about it in the most kindly possible way, now she says we are bullying her!

She is completely unprepared and we are starting to think that she lied to get accepted by our supervisor. She is destroying the amicable relations in our lab and affecting performance of almost everybody. I decided to program the most I can in my laptop instead of using the HPCC, but a process that gets done in five minutes at home is solved in seconds in the lab.

We don't want to mess up her reputation with our supervisor, but we got to find solutions. Does anyone had a similar situation with a colleague? How would you solve it in the most diplomatic way?

UPDATE: Group meeting this morning. Our supervisor found out she has done nothing. She blame us. Our supervisor said it is not our business to solve her problems, she might have spoken them out a couple of weeks ago. She (our supervisor) asked her to separate an appointment to talk privately. Lets see what happens...