All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His Slave and Messenger.
The husband and wife, especially those who are newly married, should do their utmost to build trust between each other and avoid anything that may lead to discord. This is because married life is a long journey surrounded by many problems that can be overcome by mutual understanding.
In principle, there is nothing wrong with a man teaching women about Islam if everyone adheres to the Islamic guidelines such as not being alone in seclusion or using soft speech and the like. However, it is better for women teach and advise women to avoid the causes of temptation as we have pointed out in the Fatwa 30911.
It appears that what you feel is a form of jealousy. It is something natural for a woman to be jealous over her husband; however, it should be moderate. This is because going to extremes in that can make one fall into an undesirable form of jealousy that may lead to bad assumptions, spying or other evils. Kindly refer to Fatwa 90757 for benefit on how a woman can overcome undesirable and exaggerated jealousy.
We advise to kindly and gently advise your husband and urge him to be cautious and remind him that there is nothing like being on the safe side. As for your question: 'should a husband ask his wife before anything he does?', we do not say that he should do so, but if he asks her to please her and win her heart, this is good, given that it may not be good for a wife to know everything related to her husband.
Allaah Knows best.