Nikolai stood for a moment, sucking in the warm, salty air that now became synonymous with Selene. He strolled to the inn with a huge smile on his face. The feelings of when he first awakened and gained money flowed through his body.
'I feel light, free and my path...' He reached out into the air as if grasping the stars in the sky; he felt the jumbled and complicated feelings in his chest vanish.
"That's right... I will save mother, make Nikita and Selene the happiest women I can and become strong enough to crush any troubles that come her way."
There were other thoughts and issues, but now Nikolai didn't think or complicated the feelings. If Lisa seduced him, he would enjoy it and play along. Should it go somewhere, he would tell his wives and take it from there. If it ended as a mere game or a bit of fun, then so be it.
His priorities were being set. The top three were his mother, father and two fiancees.
He's not actually going to pursue any of those women, it's just to display his new feelings of comfort within his own body as a monster and former human.
Nikolai is embracing the desire, lust and greed his monster blood brings, while saving the action for Nikita and Selene.