problem solve what needs to change and what you're going to say and the boundaries you're going to draw. If she can't offer insight and support for your feelings and point of view than you got bigger issues in your marriage. You two should be able to turn to one another. Second, if you and your wife can talk about this then consider writing your in-laws an email. The gesture may seem a little serious and over-the-top, but you can say everything you want to say in an email, reread it, even throw in some humor but get some of your points across. And also gives them time to respond and react.

Short of that, just change the subject. And please show your wife around campus, take her to a fan fest, an away game, not too late to flirt to convert. 😉