Lyna met Isaac outside, and grinned. "Impressive, my friend. However, your skills may need improvement." The young woman jumped in the air towards him, using Force Speed. Using her abilities really paid off. But she didn't want to hurt the guy or anything. She just wanted to show him who was boss.
Lyna brought down her lightsabers on him, seeing what he was planning to do next. If having a sparing session met buying his and her trust together... then so be it.