Spend some time to figure out what is going on in her head during sex and tap into it. Learn her fears and insecurities so you both can deeply connect on an emotional level.
2. Take load off her mind
Women find it hard to get in the mood, let alone enjoy intercourse because they usually have a million things going on in their minds. These things include tasks that need to be completed, chores, conversations with family and friends, and many other things.
First, help her complete her pending tasks during the day so she'll have time for you. Then help her process her feelings by asking about what's on her mind and helping her resolve them.
3. Spend time with the kids
Make a habit of playing and spending time with the kids because your wife loves the kids more than anything. When she sees you showing so much love to the kids, it'll reignite the love she has for you.
It's not about taking responsibility for the kids so she'll have more time (although that is a nice idea); it is about emotional bonding. In addition, when you share the children's weight with her, she'll have more time for you.
Men struggle to give compliments, but letting your wife know how much you appreciate and care for her goes a long way in turning her on. Look for an area where your wife has been doing an excellent job, be it taking care of the kids or her body, and appreciate her.