Jessica’s birth mother is dead.
Family is about more than biology. If you have a baby by sperm or egg donation, if you have a baby through surrogacy, or a baby whose father doesn’t want to know, do you think about that child actually belonging to someone else because you’re not their family?
If this tie to blood is so important then we need to rethink the ethics around anything which results in a child being brought up by someone who isn’t biologically related to them.
So sperm/egg donation, surrogacy, step parenting/blending families. The exception possibly being adoption because adoption is usually done in the best interests of the child when they are at risk of abuse or harm.
But the rest - there’s no need for anyone to be bringing up a child which isn’t biologically theirs. After all, they’re not really that child’s family are they?