Maybe the son's friends are part of a book club. They are going on a trip to visit an old library that has a lot of rare books. They take the mom because she is also an avid reader. Along the way, they discuss their favorite books and authors. When they reach the library, they are all in awe of the ancient tomes and spend hours exploring. The mom even discovers a book that she has been searching for for a long time.
It could be that the son's friends, perhaps through peer pressure or some kind of mischievous idea, try to get the son to do something that involves his mom in an unexpected way. For example, they might dare the son to invite his mom to a very uncool event for her like a skateboarding competition among kids and then try to make her participate in some way.
She should immediately contact the police. The police are trained to handle such situations and can protect her and her family from further harm.
Perhaps the story is set during a summer vacation. The son has his friends over often. The mom decides to teach them all some cooking skills. They start with simple recipes like making cookies and progress to more complex ones. Along the way, they share stories, laugh a great deal, and the mom becomes like a mentor to the son's friends, which enriches their friendship with her son.
The plot could be that a mom and son are on a scooter ride in the city. The mom is taking the son to his favorite ice - cream parlor. As they ride, they encounter a traffic jam. But the mom takes a shortcut through a small alley and they reach the parlor in time. The son is overjoyed and they enjoy their ice - creams together.
If 'taken' in a more negative sense like kidnapped, that would be a very different story. But let's assume a positive meaning. The son's friends might be part of a volunteer group and they take the mom to help out at a local community center. The mom gets to interact with the kids there and share her cooking skills, while the son's friends learn a lot from her as well. It becomes a great bonding experience for all of them.
The first consequence would be extreme discomfort for the son's friends. They would likely be very embarrassed and might even develop a negative view of the family. Also, it could cause psychological harm to the son, as it is a very abnormal and inappropriate situation for him to face.
The friend might have needed the mom's help with something urgently. For instance, if there was a problem with the food or the entertainment at the party.
Maybe they went to a quiet place to have a private chat. It could be that the friend wanted to share some important news or just catch up away from the noise of the party.
This is a rather dark and complex scenario. One possible plot could be in a mystery thriller story where a devious antagonist uses charm and manipulation to seduce the mom, wife, and daughter in order to gain control over a family's secrets or fortune. For example, he might start by befriending the family, gradually winning their trust, and then using their vulnerabilities against them.
I'm not sure specifically what this 'mom taken at son's party' story is about without more details. It could be that the mom was suddenly called away during the party, or perhaps she got involved in an unexpected situation at the party.