我朋友struggle a few months, at the end, she left him. She believed her wife never knows her husband has a girlfriend outside for a few months. And we think, my friend may not the first girl he stay with.
If you found your husband so strange, you see how to ask him or follow him silently.
I have another case :
At the beginning, her husband did business in China,.....then seldom went back HK and did not pay for children's 生活費. Her husband finally admitted he has a second wife in China. Then, divorced at the end.