Is it lawful to forbide sisters from attending weddings?

Q: I prevent my sisters from going to the wedding parties held in our neighborhood. Since this matter upsets my mother and sisters and makes them call me 'unjust' as all the girls of the neighborhood attend such parties, I ask about the Shari`ah ruling on my act; is it injustice, as my mother claims? Am I a sinner? Please guide me. May Allah guide you!

A: If the Walimah (wedding dinner) includes forbidden acts such as men mixing with women, or serving forbidden food and drinks, or singing using musical instruments, and so on, then it is not permissible to attend. It is permissible for women to sing while using the tambourine at marriage weddings. If the Walimah does not include serving forbidden food or drink, there is no harm for women to attend. May Allah grant us success. May peace and blessings be upon our Prophet, his family and Companions.