"I seek the light of golden rays I seek protection, thus I pray for the Goddess' forces at my side, angels, sages, spirit guides or wolves who walk with cunning skill... Come to my aid, I seek your will; Black crow soaring, light my path So I am victim to no one's wrath; And when my journey knows success, to those who aid me Goddess bless."
Its an old spell but a good one. Its one of very few that I use that I did not write myself. I don't know the original source. But it has worked many times for me and others I have used it for. Just change it around a bit such as:
"I seek the light of golden rays, I seek protection thus I pray for the Goddess forces at (names) side....come to their aid, I seek your will.....light their path, so they are victim to no one....when their journey knows success, to those who aid me Goddess bless"
Light a white or gold candle for focus. Focus on them leaving safely while chanting this for as long as you feel you need to. I've chanted this for 30min straight before for a friend who was in a dangerous situation in the military. He came home safely.
You should feel strong presences when you have been heard. When you feel the presences, speak your intention (be clear and have only one main goal, dont jump around or tell them how to do their job). Explain the situation and explain why this is so important. These beings are compassionate so be sure to put your emotion into it. Ask that they help them. You should sense or hear a sign that they will accept the plea. Ask for a sign if one isn't given automatically. Be patient and open to the possibilities, it could be as simple as the flicker of your candle (when the room has no draft) or a feeling of comfort.
Thank them and extinguish the candle. Save the candle in a safe place like a dresser drawer.
The job is done. Feel confidant that your calvary has arrived and will help your sister and nieces.
Blessings to you and yours