The use of "、" in more than three items
I guess the reason why it is put in this way, as through a search, you will find that 沙溢、胡可 are the parents and 安吉、小鱼儿 are the children in the family.

As far as I know, the "correct" form is A、B、C与D. But it may not the only acceptable way, especially when you can divide the words into groups. Like in this one, parents and children. The four words are not equivalent now, and "与" is used between groups but not between the words.