When two people are deeply connected and one crosses to The Other Side, the person who remains on Earth may feel as if their heart is broken. They grieve. They may take advantage of the next exit point which comes their way, and cross over.
In addition, the person who passed first may beckon the second person to, “Come on over. The water’s fine.” When a loved one calls from The Other Side, the living person can choose to say “no” or decide to say, “yes.” The second person may be able to hear the first person clearly, but be reluctant to share this information with their family.
Choosing to follow their beloved is why two people may cross within days, or months, of each other.