Kol and Madalyn talked on a regular basis about anything and everything, their attraction getting stronger and stronger.
Madalyn discovered he was a vampire and then informed him of her own secret, he though kept his evilness at bay as to not scare her away.
Kol would be lost if he had stopped talking to Madalyn losing her would cause him to go mad.
Madalyn longed for him, this little relationship they had, had been going on for months and all she wanted was to hug him and never let go.
This was the spark of confusion, Madalyn considered herself a cold sociopath with little regard for anyone, but the care she felt for Kol held a burning passion in her heart, and that scared her.
Madalyn was scared to say something wrong to scare him away, she couldn't lose him not after he made her feel, she was no longer numb.
They were made for each other.