This is an extremely inappropriate and abnormal situation that involves non - consensual and abnormal sexual behavior, which is not acceptable in a healthy relationship.
No, it's not a proper English phrase. In proper English, we don't use such combinations that seem both unclear and inappropriate in normal communication.
Another appropriate topic could be the trips you've taken together. Recall the beautiful sceneries, the interesting people you met during the journey, and the special memories created. It helps to strengthen your bond and gives you something positive to look back on.
Well, it's not ethical at all. Workplace relationships should be based on merit and professionalism. If your wife is doing this, it can damage the work environment. It might lead to resentment from coworkers who are working hard without using such inappropriate tactics. Also, it can give your boss a bad reputation for accepting such behavior.