Is it permissible for a Muslim woman to pray in front of a Christian woman?

The prayer becomes invalid by omitting a condition for its validity while being able to fulfill it, or by intentionally omitting a pillar (rukn) or an obligation (wajib) from its components, or by performing an invalidating act (mubtil). Based on this, the validity of a Muslim woman's prayer is not affected by the presence of a Christian or Jewish woman in front of her, because this has no relation to the conditions, pillars, or invalidating acts of prayer. Therefore, the woman's prayer is valid.