Trust! Trust him! Trust her! The first reason why a relationship fails is because of the absence of trust. If trust is not in a relationship it will fall. It is okay to have suspicions. It is okay to have speculations. It is okay to have doubts. But it is also okay to confirm your speculations. I was initially in the place as I speak of but I was able to put my speculations to rest by contacting a freelance engineer (alphablakkhat at gmail com) to do minor spy job. When results came back from the test he did I was ashamed that I didn't trust this man in the first place.
So it is okay to do all of this but the utmost importance is gaining back that trust. So be sure to make sure you trust each other as that is the bedrock