I think the transition out of the Witnesses brings a lot of instability initially on different levels such as the routine, emotions, adjusment with family (shunning), etc. It requires adjustment in the way you socialize, it brings insecurities because you feel uncertain about how to use the new acquired freedoms.
You suddenly feel like a teenager with curiosities, willing to explore, and that may be a threat to the partner. You guys need to talk, and define limits, set rules, and support each other along the way. Be very careful with potential addictions, alcohol, drugs, etc.
For us it was important to define a structure, to start attending community, school events, getting to know other parents my our kid's school, making new friends. You need to get involved with other activities, change your routine, take a break from the house, take turns. Go to the gym, etc. We started attending Unitarian Universalists meetings on Sunday as a family to find some sort of spiritual inspiration without doctrines, without commitment, just in an open and flexible basis.
As a couple this is the time to get to know each other ,and to be completely honest, to unite and support each other and build real trust. You need to share the responsibilities and need to give each other some space. It's not easy with the stress and the strain with family, losing your religion, and losing many friends. You may even start questioning if you made the right decision, and second guessing yourself. The void is huge ,and you need to start filling in with new meaning. But it definitely gets better. It takes time, patience and commitment.
My wife and I, along with our two kids have finally found the stability, and have settled down after the first few months of turmoil after leaving the cult. Best wishes and best of luck in your journey. You can make it!
I suggest your read a recent post I made about the transition to becoming a free man, I hope it helps.
http://www.jehovahs-witness.net/jw/experiences/199632/1/Documented-transition-from-being-an-elder-to-becoming-a-free-man