All the pickup advice you learn will work on your wife too. She has not lost her sex drive, she needs you to switch it back on. That is the game you could be playing. You don't have to choose between your wife and another girl or between divorce (going through the courts, leaving your kids etc) and being single again. You can work on your wife. Be patient and persistant, she can't just switch instantly between being a mum and being a sex vixen so your task is not physical but emotional and in learning how to get her in the mood. Most men when they get married forget about a lot of things, get lazy and then wonder why their partner has a headache all the time. You have kids, look after them. You can't always get what you want but if you try sometimes you get what you need. Good luck