Never, no way! 
This is not an option for Real Madrid to leave it as it is with Mbappe. I remember how often it was Mbappe who scored goals against Real Madrid. In all of the last three matches the encounters were very close and each time it was Mbappe who contributed a goal. And it wasn't just about the goals scored, but about how dangerous he was during the whole games. It would be reckless by Real Madrid to not sign him when they get the chance to do so.
I see in the news that Real Madrid have already agreed on Mbappe's transfer to Real Madrid, but I can't understand whether these are just rumors, or have they already decided everything? Mbappe will receive 35 million euros a year and will be Real Madrid's highest paid player. And it seems that the transition will only be possible in the summer, when his contract with PSG ends. Real Madrid just want this player on their team, I doubt they are too worried about him scoring against them again. This is not an option for Real Madrid to leave it as it is with Mbappe. I remember how often it was Mbappe who scored goals against Real Madrid. In all of the last three matches the encounters were very close and each time it was Mbappe who contributed a goal. And it wasn't just about the goals scored, but about how dangerous he was during the whole games. It would be reckless by Real Madrid to not sign him when they get the chance to do so.