A man forced his wife to authorize him to throw the pebbles on her behalf although she was capable of doing so by herself?
All perfect praise be to Allah, The Lord of the worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.
It is impressible to authorize someone to throw the pebbles when a person can do so by himself. A person who commissions another person to throw the pebbles on his behalf is required to slaughter a sacrificial animal.
As regards this case of a woman whose husband forced her to authorize someone to throw the pebbles on her behalf although she was capable of throwing the pebbles by herself, if this forcing is inconsiderable under Sharee‘ah, then the woman is liable to slaughtering a sacrificial animal for not throwing by herself. If the forcing is considerable under Sharee‘ah; that is her husband beat her or imprisoned her or treated her in a way that is considered coercion under Sharee‘ah, she is not liable to anything, as the Prophet was reported to have said, “Allah has forgiven the members of my Ummah for their unintentional errors, forgetfulness and what they were coerced to do.” [Ibn Maajah and Al-Bayhaqi] In this case, it is conditional that her husband directly prevented her from throwing by herself. Allah Knows best.