Asalamu Aleikum,The good thing is that you have realized what could develop as an issue to your marriage life and you are addressing it. The little time that you have left, please try to divide it between your kids and wife. Ensure to spend even if its 15 minutes to 30 minutes per child if you can as quality time or helping out with the homework or play games and then after putting the kids to bed, you could spend some quality time with your wife. Even 30 minutes to 1 hour is plenty, as long as you talk through your day and show the caringness between you. Honesty and a little effort can take you a long way, or else, you will see the marriage crumbling down under your eyes and might be too late to build the closeness again. Good luck.