Girlfriend Hiding the fact that Man is staying over w/ her

I will give my opinion, be it right or wrong.  Personally I think you should give to the relationship what you want.  You looked through her emails and I suspect you did not have her permission.  So with that said tell her you looked and that since you are talking about marriage ( a really big step) you just want to be open about everything.  Tell her you know about the other guy and then in a kind and un aggressive manner (hard to do I know) tell her that you are okay with it.  If you are truely okay with it....  And what is this sleeping around with other people crap,  when you give your life to someone it is just that and no one else!  

This is a complicated question.

First of all I think you made a big mistake reading her e-mail, It' intrusive and disrespectful.Second, I think you made another mistake not confronting her or asking her about this right away - I don't know how you got to see her e-mail, if you just looked at the computer and her e-mails were out there to see or if you hacked into her account. Third, I think you were being dishonest with her and yourself when you said "I don't mind if you have sex with other guys, just don't hide it from me". I heard that from a couple of men in the past - basically this is a very mixed message that's a passive aggressive way of being in control - you are afraid she'll cheat on you so the one thing you manage to do without coming off as  a closed minded jealous guy is to at least try and make sure you have all the info.

It seem to me that constantly in the relationship you are having a serious trust issue that makes you spy on your girlfriend and try to catch instead of talking about all this openly.

Saying that - I don't know why she didn't tell you about it, maybe to was all still in planning and she wasn't sure it was going to happened, maybe she was afraid you would say "no" to a guy staying at her house, maybe she wanted to surprise you, maybe she was planning to have sex with the guy and not tell you about it. I think the only way to find out is talk to her openly about it - admit to reading her e-mails and apologize for that, and then ask her - not in an accusing way, why she chose not to share her friend visit with you.

I think that before you resolve your trust issue, you shouldn't marry this girl, I don't think it's possible to built a good relationship based on so much mistrust and doubts and since your son's involved as well, I think you have to be 100% sure about this woman before you let her enter his life. 

hiya mate. to allow your girlfriend to sleep with other people shows a complete lack of self respect on your part !!! if your gf wants to sleep with other people then i think personally that shows she doesnt want to enter into a committed relationship with you and you are wasting your time !!!

 good luck

Ask her to marry U and then see what happens.

It is obviuse that you as well do not know what you want in a woman if you can care less if she sleeps with another guy that question is simple stop seeing her til you know what you want , that you do not want the girl or woman to sleep with anyone at all even if she may want to if you really like her , if she really likes you she would not want to except with you.

So again til then stay out of the dating thing till you know you , what you want truthfully , if she wants to stay with you she needs to do the same thing for her , also with in her as well as you do with in yourself.