Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answered 3 years ago

If you are sure that you visiting such relatives will definitely make
you fall in to sinful acts like shaking hands with the opposite gender
or eating or drinking Haraam food, then you should not visit them

If such sinful acts are not there but the female members who are
not wearing Hijab will come in front of you, you can avoid looking at them by lowering your gaze.