If I were you, just wait until she comes back from her trip and let her actions do the talking. I have heard similar things from my H and then 2 days later goes back on his word. It is so hard to question everything that they say to you but you have remember to guard yourself against getting hurt over and over again. Remember that her actions will speak volumes.
"Be patient to persevere and wait for God to heal. Keep in mind that you are both imperfect people. Look to God as the source of all you want to see in your marriage and don't worry how it will happen...Leave it in His hands."