No, no.  Hikari will obviously be doing it on purpose when she starts saying things like, "Masato, I need your thick cock--ney accent, for this part in the school play!"  Or when she teams up with Sanro to sing the song from<em>Walk Hard</em>...<br/><br/>Let's Duet!  In ways that make us feel good,<br/>Let's Duet!  And make that perfect sound<br/>You and me together,<br/>Perfect harmony we've found<br/>Let's Du~et,<br/>Let's Du~et