At Exodus 18:6, Moshe's father-in-law, Yisro, tells Moshe that he had come with Moshe's wife and "her sons." Why didn't he say to Moshe that she had come with "your sons"?
Alshich explains that Yisro was worried: Perhaps Moshe would not be interested in a Midyanite woman and would rather marry a Jewess. He therefore emphasized that he brought "her two sons" with him (and not "his two sons"), since a man comes to like his wife because of the children she bears him, and this would persuade Moshe to remarry Tziporah. (See also Maskil Ledovid on Rashi for a very similar explanation)