It Was a Mistake, Grand Duke!

I somehow kidnapped the Grand Duke I had a one-sided love for!

To hide this fact we had to pretend being in a relationship, but the Grand Duke is behaving strangely:

"Vivian, may I kiss you?"

Huh? Are we kissing as soon as we started dating?

"We'll kiss, then take take a step further and get married."

Is this relationship going to be alright?