"Tried her hardest to be like us, but she still had Jedi weakness in her. She was slow to kill and too quick to trust!" the Sith acolyte scoffed, Lysa had been no friend of hers and she had no intentions of pretending otherwise while she was desperately trying to brush off his persistent taunting, but it was chipping through the blockade she had made around her concealed emotions and she was finding it harder and harder to keep her head and concentrate solely on attacking and parrying counterattacks the longer this duel wore on. 

She no longer worried or cared about the possibility of the tomb coming down around their heads as they fought if the support pillars were damaged, all she wanted was to end this and wipe that smug sneer off his snarky face for good. So focused she had been on his words, that she failed to keep track of his saber arm and thus his swift lunge attack hit its mark, slicing into her torso despite her best attempts to twist out of range in the cramped tomb. Hissing out a pained gasp, she managed to duck to avoid the overhead strike that soon followed, but was unprepared for the ceiling crumbling downwards as a result.

Aria realised all too late her mistake, her eyes leaving Yerbol's to dart frantically towards the dark tunnel opening as the entire tomb rumbled and debris and dust began to fall from above as the ceiling collapsed on top of them.
"Oh, shit!" she cursed as the reality of what was about to happen sank in and her self-preservation instincts kicked in, taking over any desire to spill more Jedi blood. She bolted for the tomb's entrance but even with speed heightened by the Force she couldn't make it in time before a shower of earth and rubble cascaded into the gap and sealed the two opponents in the tomb.

Aria dug in her heels and skidded to a stop just short of the blockade, knocked off her feet by the collapsing debris she hastily extinguished and holstered both sabers to allow her to use her hands to break her fall, slumping against the packed earth she coughed and choked on the dust the rockslide had stirred up. 
"No...no no no...c-crap!" squinting as the dust settled she could barely make out Yerbol's form still close to the center of the chamber. 
"Nice job, Jedi. Now we're both stuck in here!" she tried to hide her wince as the wound he had given her began to protest violently to her sudden dash towards the tunnel, smirking cruelly. "Oh well, at least I get to watch you die, too."