No, this is a serious threat to your marriage. Do not minimize it yourself, nor allow her to brush off your very legitimate concerns.
You have several issues to deal with. The infidelity, yes infidelity, even if there is nothing worse than chats and pics, that is still far across the line, and needs to be dealt with. You need to be clear about what you will not accept, and deliver consequences.
Second, it would seem that you are becoming less than partners in your marriage. She needs to take her fair share of the responsibility, and you yours, but not more. It will slowly erode your marriage if you let the balance of power get too skewed.
You have several issues to deal with. The infidelity, yes infidelity, even if there is nothing worse than chats and pics, that is still far across the line, and needs to be dealt with. You need to be clear about what you will not accept, and deliver consequences.
Second, it would seem that you are becoming less than partners in your marriage. She needs to take her fair share of the responsibility, and you yours, but not more. It will slowly erode your marriage if you let the balance of power get too skewed.