Though Eva doesn’t want to make personal sacrifices for Kevin, she does sacrifice a lot for Franklin. She goes through with her pregnancy mostly because Franklin wants a child, and she hides her pain and suffering from him. All of this leads to Eva resenting both Franklin and Kevin, and this in turn creates an unhealthy environment for Kevin to grow up in. Eva avoiding a C-section because she doesn’t want a scar shows that she can be vain at times, though it’s also worth noting that a C-section is a serious medical procedure that can have serious and even permanent side effects.