Just been to a wedding, bride & groom in their 50s. Each have two kids from a previous significant relationship in their past.
Would you expect to hear in the speeches not only how much the bride & groom love each other but also the bringing together of two families, welcoming each others children to a bigger family type stuff.
YANBU B&G should acknowledge each others children.
YABU it's all about the B&G no need to mention the kids.