Without having any knowledge of the issues he may have with the OP eg. deep seated insecurity,

- hubby has/had a history of cheating, even though with one person whom you found out about - he should try to make her more comfortable to redeem the trust that was severely damaged;

- "bad feelings especially since we don't web cam anymore" - that a huge red flag. Since he's away from her and the kids, he would be inclined to ensure some sense of normalcy and contact;

- good advice from qatar_engineer and some other posters;

- situations like these are why some of women uproot themselves from their comforts of home to be with their hubby, so that he would not be too tempted to stray. Good intentions may be there but the temptations are great over there.

OP, is there any way you can join him in Qatar? (Please don't rush in and fall for co-called agents who claim they can get you in to Qatar for a fee. Please go by way of the official channels to ensure that you are not duped.)

All the best to you. Take care.