Wikipedia concorda que nenhum visto é necessário para esposas libanesas de egípcios com prova de casamento.
Visa exemption also applies to sons and daughters born to an Egyptian fathers (except nationals of Syria, Iraq, Yemen and Qatar) having an Egyptian mother and being born after 25 July 2004 (except nationals of Syria, Iraq, Qatar and Yemen)
wives of Egyptian nationals holding proof of marriage. (except nationals of Syria, Iraq, Morocco and Qatar)
A mesma informação aparece em Timatic . Talvez seja necessário levar isso ao conhecimento do funcionário do check-in, mas esse é o banco de dados oficial deles.
[ADICIONADO: Trecho do link Timatic preenchido para o destino do Egito e passaporte do Líbano]
Egypt - Destination Visa
Visa required.
The following are exempt from holding a visa: Nationals of Lebanon with a normal passport and who are older than 50 years or younger than 16 years for a maximum stay of 3 months.
Wives of Egyptian nationals.