If you are a married mother and think feminism is about giving you the choice between work and full-time motherhood, you might be sexist.
Freedom - equality - is, in this situation, not about YOU(singular)R choice, but rather YOU(plural)R choice. Or Y'alls choice, as the case may be. You are married. If you are treating this as your choice alone, you are telling your spouse he or she has no choice at all. And that's not helping.