Love / Polish woman and children [14]

Hi

New to the site, i am looking for advice about my relationship with my polish partner, we have been together 2.5 yrs and i have children from previous marriage, my polish partner has always kept my children secret from her family because she said its not acceptable. now she says she is leaving me because she cant accept my kids,( my kids live with their mum and i visit monthly) we were due to get married next year and i think shes worried that her family will influence her when they find out about my kids, i love my kids and i love her, i dont want to loose her, is is such a big thing that i have kids? will her relatives frown upon it? please advise, thank you