>>33523294
Hire a private detective if there's enough probable suspension of an affair. You also need to consider you're preggers so your judgement won't be fully transparent respectfully.
Did you see the messages? It could very well be related to work.
If there's explicit monkey buisness then get a PI to collect evidence just to protect you in the event of a fallout for your marriage.
I'd like to give the guy the benefit of the doubt, it is your marriage not any of ours so weigh your choices carefully as you navigate the paranoia.