Yes, she had scenes and lines in both films (see below). And, yes, she's
the woman sharing her surprise with Sonny's...umm...endowment with the
other bridesmaids at the reception.
Not that you asked, but when asked what my favorite movie is I always
bounce back and forth between these two movies. One time it's the
original, next time it's the sequel. For me, they're the best films I
have ever seen.
From
http://www.thegodfathertrilogy.com/gf1/transcript/gf1transcript.html
The Godfather
SONNY: Hey Sandra, do me a favor, huh; watch the kids -- don't let'em
run wild, all right?
SANDRA: Well, you watch yourself, all right?
--------------------------------------------------
CUT TO: Sonny's house just after talking to Michael on the phone. Sonny
hangs up. -night
SANDRA: (sadly hugging Sonny)
Oh my God...
[there's a loud crash heard OS from outside the house]
SANDRA: (as the baby, Santino Jr, starts to cry)
Oh! Sonny!
----------------------------------------------------
CUT TO: The Don's bedroom. Vito Corleone is being visited by family
members. -day
SONNY'S TWIN DAUGHTER
I love you, Grandpa.
SANDRA: (carrying a crying Santino Jr)
I'm sorry, Pa -- he doesn't know you yet.
----------------------------------------------------
CUT TO: Kitchen, as Mama and others prepare dinner -day
SANDRA: (background)
...you want all of that chicken cacciatore for you, sweetheart?
(then, to Connie, who's cutting bread)
Oh, hey, that's enough bread!
CONNIE: (background)
But I like bread!
SANDRA: Oh I know, but how much can you eat? (background)
-------------------------------------------------------
CUT TO: The Don's kitchen. Mama Corleone answers the phone with a
Santino Jr in her
arms, who's crying loudly. -day
MAMA: (into phone, as baby cries)
Connie, what's a' matter -- I can't hear you, what is it? Connie, talk
louder -- the baby's
crying.
(then, as Sonny comes in)
Santino, I can't understand -- I don't know -- I don't understand 'er...
SONNY: (towards Sandra who's trying to calm the baby)
Shhhh
(then, into the phone just before the baby screams)
Yeah, Connie...
CONNIE'S VOICE: (on the phone, barely audible)
Carlo... -?- ...now don't you come...
SONNY: (into the phone)
Listen -- you wait there.
CONNIE: (over the phone, barely audible)
SONNY: No no -- you just wait there!
(then, irate, hanging up the phone)
Sonofabitch.
MAMA: What's the matter?
SONNY: (as he leaves the kitchen)
Sonofabitch!
MAMA: What's the matter?
SONNY: (OS)
Sonofa...
SANDRA: (going after him)
Sonny...?
-------------------------------------------
The Godfather II
If it wasn't so late I would copy-and-paste the references from the
second film, but here is the link:
http://www.awesomefilm.com/script/godfather2.html
I used the FIND option under EDIT on the browser toolbar. There's
supposed to be 25 references to Sandra Corleone.
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