explanation? how is this possible?

[ISJake//]

Good Afternoon, I would probably suggest you run a full scan using both your antivirus program, and MalwareBytes. You can obtain MalwareBytes here: http://www.MalwareBytes.com. From what I understand the Gmailtalkpluging.log, logs everything which you have done on your gmail. So it could be possible that your husband isn't being totally honest with you.