As the pride lands developed after the incident with scar trying to kill Mufasa. everyone were happy and breeding as time passed.. Or so we thought everyone was

Scar is known as the 'evil' brother of Mufasa everyone claims him to be after he tried to kill Mufasa but failed miserably and so he decided to become king of the outlands

{...}

Scar was minding his own business walking around the pride lands for food.. When he suddenly saw a lioness, unconscious near the pound. He was tempted, to just leave this lioness be but decided against it and took her to his den.

Scar was laying down near the exit of his den chewing on zebra meat in slight annoyance but he was just waiting for the lioness to wake up. But he was annoyed but curious as to why a pregnant lioness would be passed out. And out in the outlands when it was a Banished area to the ones belonging in the pride lands Before the starting day of mating season.