I discovered a text conversation between DH and a (what turned out to be) ex-colleague. I didn't know who she was. The text messages were entirely innocent-sounding (spouses and children mentioned, for example) but I was a bit uneasy because DH hadn't mentioned this person, hadn't mentioned the fact that he was in contact with her, hadn't mentioned the fact that he was going to try and meet up with her whilst he was visiting her home town on a stag do.
So I asked him about her and he told me he thought there was no need to mention it because it was all so innocent. I said I could see from the texts that I had seen that it looked innocent but what made me suspicious was the fact he hadn't said anything. So communication channels were open, the opportunity was there to tell whatever innocent story there was to tell, and he told me he last spoke to her a year and a half ago. I've just seen more texts showing that in fact they didn't just speak or text, they met up a year ago. I absolutely don't think anything is going on, but the fact that he lied and lied again is making me extremely suspicious.
Other texts I have seen indicate that he was doing coke on this stag weekend and went to a house party, neither of which fill me with joy but the fact that he hasn't mentioned them make me suspicious.
I don't know what to do. He had the opportunity to tell me stuff and didn't. Do I confront him, and alert him to the fact that I snooped, or wait and see if i can gather anything else?