I just caught my wife sexting with her ex boyfriend

I just caught my wife sexting with her ex boyfriend. To me sexting is the same as cheating. This is the second time she has done it with this ex. This will be her third time that she has done it to me. This time I just happen to catch a glimpse on her phone of messages they were sending back and forth. When I looked of course the other messages were deleted. I did manage to snap photos of the messages that were there. I’m not sure what I am going to do with the relationship I forgave her before but all of the hurt is still there from before now more has been added. I asked her what she said in her messages am I wrong to want to know what was said?