A woman stabbed her house mate through the heart and lung, then stabbed the victim's boyfriend, after being told to move out of their house in Sydney's inner west, police say.

Laura Bursle, 25 of Camperdown, appeared in Newtown Local Court this morning, charged with two counts of wounding with intent to murder.

Kaitlin Moore and her boyfriend Kristin Spann, both aged 27, were woken up by Ms Bursle when she entered their room in their house on Eton Street, Camperdown, carrying two knives yesterday morning, police said.

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Ms Bursle allegedly stabbed Ms Moore several times in the chest, puncturing her heart and lung.