Star Trek: 10 Things You Didn’t Know About Dax

Jadzia's marriage to Worf in 2374 was that host's first wedding, but the symbiont had actually already been married five other times with different hosts, three times as a bride and two as a groom. In fact, Dax parented nine children previously.

Trill society actually has a law against reassociation between joined Trill's and loved ones they knew in previous lives, primarily to allow each host to have completely new experiences. For this reason, Jadzia was likely forbidden from seeing her children, just as she was forbidden from continuing her relationship with Nilani Khan, the widow of Torias Dax.

The exact rules against reassociation are slightly vague, but, if found guilty, the punishment would be total banishment from Trill society, which would prevent their symbiont from ever joining to a new host. Generally, Trills disapprove of reassociation in all forms, but Jadzia and Ezri were allowed to freely work with Sisko, despite being his best friend previously as Curzon, so it's likely that only immediate family or partners are banned from reassociation.