The latest edition of the MTV series concluded with Guarnaccio throwing a glass and launching himself at fellow cast member Gary Beadle in an apparently unprovoked attack.
However, Pattison has since claimed on Twitter that footage of the clash was edited to portray her partner in a negative light.
"Unfortunately it seems as though they have chosen nt2 show what the argument was over on lnyts show," she wrote. "Shame but not surprising! #teamricci
"Oh and another thing.. No matter how it was edited, ricci did not start it and it was not just because he was drunk.. #morethanmeetstheeye."
Pattison also denied that she was still with her previous boyfriend when she started dating Guarnaccio, as last night's Geordie Shore suggested.
"I had broken up with dan ages before lastnights episode," she insisted. "But again with careful editing I'm being made to look like sumthin I'm nt.."
The couple are known to have fought during filming of Geordie Shore's online spinoff in January, with Pattinson apparently throwing Guarnaccio's clothes out of their hotel window afterwards.
Geordie Shore continues Tuesday (March 6) at 10pm on MTV.
> 'Geordie Shore' heads to Cancun in Spring Break for series three