Concerned by my wife's online activities?

[Michael]

My wife left her social media message page open and I was quite concerned with what I saw. She had mainly messaged guys and after seeing the messages I asked her who the guys were and she said she won't use the social media site anymore and that the guys were people who she met before me.

What she doesn't realise is that I read a couple of the messages and one of the guys messaged her saying ' what about our wedding? ' and my wife replied 'I think it is illegal to have two weddings in England '.

The second message I opened had a long message history and some of it was mildly sexual but all the messages were before my wife met me but she still messages him on occasions.

The final message I saw had a guy referring to his wife as 'my "wife"...' and my wife replied referring to me in her message as 'my "husband"...'

Maybe I am just worrying because my wife says they are only friends who she met before and that she would never leave me but I'm really not so confortable with it because of the attraction she clearly had towards them at some point. Should I be worried about these messages or forget about them?

Thankyou