Plan

The Knight of Bennett quickly adapted and said, "I'll just tell the others you gave me a beauty potion!" 

He knew this potion must be extremely precious since Abel had set up a barrier circle just because of this.

"Thank you for your consideration father. This kind of medicine has never been used on ordinary people, and you two are knights. Your body should be stronger than ordinary people. If there aren't any problems, then in time, I'll give it to mother as well. Take it!" Abel said with a smile.

Abel knew fully well this potion didn't have any side effects, but he was just worried if this youth reviving effect would last for too long. If The Lord of Marshall and The Knight of Bennett had remained this youthful for a hundred years, and some wizard found out about it, Abel would be in big trouble.