Are the Nurse's speeches in Act II, sc. 5 consistent or inconsistent with the impression you have gained of her in earlier scenes?Romeo and...

With her bumbling mannerisms and rather risque speech at
times, the Nurse is a comic figure; as such her speeches are often interjected into
serious scenes in order to provide comic relief.  When, for instance, Romeo inquires of
her who the fair maiden is at the masquerade, the Nurse provides added commentary to her
response, saying that she has nursed the girl and whoever "can lay hold of her/Shall
have the chinks" (1.5.124), not realizing that she is talking with a
Montague. 

Later in Act II, Scene 5, when the Nurse returns
to Juliet with the message from Romeo, she is delays this message by complaining of her
aches and fatigue instead.  While she may be reluctant for her cherished Juliet to be in
love and want to marry Romeo, the Nurse is probably just being the Nurse.  For, this
delay and her circumlocution is consistent with ther character.  After all, she jokes
with Juliet and even makes innuendos later about Juliet's possible
pregnancy.