To be sure, mothers do make sacrifices for their children in a thousand little ways each day. But we have to define and evaluate these things with an eternal perspective.
What most families need is not to do more things, but do live out their calling as a missionary in the things they are already doing. To be on mission, families don't need a shift in activity, but a shift in identity.
When talking with parents of young children about the idea of being in a Missional Community, of joining a small group of believers who work together to declare and demonstrate the gospel, I usually get one of two responses.