Is it permissible for a woman to pray beside her husband while she is led by him (as a ma'mūmah)?

If a woman prays with a man or with men, she stands behind everyone. There is no difference in this between a non-mahram woman and others, because Umm Sulaim and her son Anas did not stand in the same row as the Prophet, peace and blessings be upon him; rather, they stood behind him.