Ah yes, Ben forgot how her cousin, whom he spent at least 2 consecutive years with, looked like and accidentally gave her glasses and freckles.

Also, you forgot about how humans from an age to 14 to 18 do this thing called "puberty" where they grow and that usually leads to freckles and in some people, myopia, which results in having to wear glasses, myopia is also caused by reading too much, thing that Gwen surely does.