Never ever hurt your wife, no matter what you are going through.
Sometimes, you will get into fights. Your wife will insult you or say hurtful things. This will prop you up too. However, by no means, does this mean that you can hurt your wife back. If she says something hurtful, stay silent. Then, at a later time, explain to her that it hurt you. Hurting her back by saying demeaning things will get you and your relationship nowhere. In fact, it will make sure that the levels of trust deplete.
Always try being the bigger person and help yourself and your wife out.