Definitely not cheating.
Have another look at the person specification if there is one and write some STAR answers if you haven't already. Situation, Task, Achievement, Results.
So if job roles says able to deal with conflict you would give a STAR answer related to dealing with conflict.
Situation 'Customer came in, he was a right knobber, shouting and effing and jeffing cos his blow up doll had burst after only 3 years of heavy use. Anyway, I listened to the lairy fucker for 10 mins but could see Sandra from QC was getting pissed off, so I managed to calm him down, sent her to fetch a newer model out and we inflated it there and then.
Task 'we are supposed to retain customers and upgrade them every 3 years anyway. So I showed him how 'Katie' works, her key features etc and the dirty old twat was proper horny by now.
Achievement ' he spunked another £300 on 'Katie' and is coming back next month to meet 'Chloe'.
Result 'more sales and a happy wanker'.
Obviously not that particular one but you get what I mean.