Only 12 Y's, but it does fill some things in. And all of the y's in the passage function as vowels, so I'll score them accordingly. (There's the reading teacher in me coming through!)

Th- --- ---n’t m---. - s-r-t-h-- h-s -h-st -h-r- --n--t l---- t- -- s-r-t-h--. Th-s --- l----- -- -t m- --th h-s --rs l--- ---- -n- th- s----st l--- - h--- ---r s--n -n - ---’s ----. -- ---s ---l- -ry, th-s --- ---l- -- -ry-n- h-r-.
“--m- -n, ---,” s--- --rry. Th- --- ------ h-s ------ t--l. -t --sn’t - h---y ---. ---s --n s-y - l-t --th th--r t--ls, -r -h-t ----l- l-t th-m ---- -- th--r t--ls. -- h- st-ll h-- - t--l, -t ---l- -- --t---n h-s l--s.
“S--ms l--- s-m----y t-l- h-m t- st-y, s- h-’s st-y-n-. -- h- s-ts m--h l-n--r, th- --- ---l-r --ll --m- -l-n- -n- h--l h-m --- t- th- --- --st-ll-.”
“--m- -n, --y, “ - ------. Th- --- ---n’t -----.

-r-m Str---r
-y ----rly -l--ry

Karen: T (42), M (12) L (29) = 83
Felicia's Mom: N (16) = 16
Pinot's Mom: S (34) H (33) = 67
Asiel: R (20), Y (12) = 44

Letters left to guess:

ABCDEFGIJKOPQUVWXZ