If I omit the "only" in "if only" here, does it change the meaning of the sentence?

Native speaker’s answer
Rebecca
It doesn't change the meaning of the sentence, but it does change the suggestive tone of the sentence. Toodle wants Tom to pretend to be her husband. Saying "if only" in this context lets the audience know that she wants Tom to pretend that he is her husband. Toodle says this in front of Tom because she wants him to volunteer instead of asking him outright.