M.F.
Unfortunately, if visitation was granted by court order when paternity was established, you will have no choice but to let them see your children. I would try to talk to legal aid to see if you can get supervised visitation for them. What are their paternal grandparents like? Would you be more comfortable having the children stay with them and have their dad visit there? I know this is very hard, and you want to protect your children. Do you fear for your children's safety in their care during visits? Is it substantiated? If they are drinkers or do drugs, are abusers, etc. Call your local legal aid. They can find an attorney that will voluntarily help you for no fee or a drastically reduced fee. God Bless you, and just be the best mommy you can be for those children...