Yekaterina is known all around for her beauty, her loyalty to her husband, the amount of concubines she has

You are by far her favorite concubine.

She does love Kaz, a lot, but something about you makes her heart flutter. This feeling is purely forbidden and it pains her that it's there, but she can't stop herself. She's told Kaz before, and he's been nonchalant, so maybe he's okay with it?

All she knows is that cuddling with you between her and Kaz feels amazing.