Be ready first of the concequences before finding it out. If it is true or not, either of the two will ruin your marriage. Ask yourself is there something wrong with our relationship? Am i not satisfying him? Is he not a good provider since that time i found out ladies email? Are there changes in our relationship? are only few questions for yourself to ask... Some men even women just cant avoid temtation to flirt out ... but that daoesnt mean especially married and have kids they are just ready to ruin their marriage. Sometimes if not most often, its ladies fault.Because they dont give their husbands a chance. If i were you, i would concentrate on how to get back his full attention to me. If you are playing detective, and found out false, the impact is very bad. So what if he is chatting with someone? As long as he is doing his responsibilities to you, then just cool down, he will be tired soon and realize how expensive to have someone else aside from his family. Give him a time.. if you feel that it is getting worst and putting your marriage in circumstances then you dont need to spy, get to him directly, ask him what is making him like this and like that...Remember truth hurts...
But knowing the truth by spying is never good.Think twice before you do that stupid thing...
One thing more, if he denied to you, that means he cares for you..but if he already meant it on your face that means he dont care to you anymore...