Why did the lady sacrifice herself for Peeta?

Why did the lady sacrifice herself for Peeta? Mags also sacrifices herself for their benefits. She may have known she wouldn’t survive the Games because of her age and frailty, but if her concern was just for Finnick, the two of them could have easily survived by running away and leaving Katniss and Peeta to die.

Mags also sacrifices herself for their benefits. She may have known she wouldn’t survive the Games because of her age and frailty, but if her concern was just for Finnick, the two of them could have easily survived by running away and leaving Katniss and Peeta to die.