Your story will make a very good AAR, if you try to stick on that general's viewpoints... you can say at the bribing sequence:

Yester day, the Romans promise me a lot of gold and women... at first I resist... I try to remember my family in germania, and my high king... but today, I hear from my soldiers that the high king secretly sleeps with my wife when I was away... (so, is that he called CARE FOR MY FAMILY?!?) So I gladly accept the Roman's offer... at least roman girls are cleaner than my stinking wife...