this “fear” is a teenager fear, mostly because teenagers are selfish and only concerned with themselves and how they appear to others, which is entirely normal for that life stage. It’s a part of maturation. Teens are constantly “testing“ the world around them, boundaries, relationships, learning and engaging with the wider world. Being a cxnt during that time, particularly personally to each other, is to be expected.
HOWEVER Bekah is an adult. As an adult, the rules are get the fuck over it or do something about it. Muh stretch marks isn’t a “look at me, LOVE ME” moment, it’s a “meh, it’s a thing” moment or “I don’t like this, I might look into weightlos/laser/lifestyle changes on my own in my own time” Moment. They’re your options.
bekah doesn’t have sex because of stretch marks, Bekah doesn’t have sex because her personality renders any interactions with a normal emotionally healthy person impossible.