I don't think those are even a result of a lifetime. Stretch marks that red mean it was likely a rapid, significant weight gain. I have a fair number of my own marks from growth spurts, the blessing/curse of being an F cup, and growing up as a fat kid, and I recall them being a silvery scar colour with only a hint of pink when they were new. To get that bright of a red, you gotta outgrow your own skin with an aggressive level of speed.