If it were my sister I'd be more direct and I'd be sharing a few more options. First, we'd be talking about living arrangements, and rules around that. Yes, I'd let her move in to help care for her baby. Or perhaps I'd be helping with childcare while my sister finished school, or worked.
OR... I'd agree to take her baby. I'm older, married, and have children. I'd happily have another. That would probably be difficult in the long run. There would be written agreements in line with legal adoption.
I would hate to have my niece or nephew out there with another family. But that would be another option I'd be bringing up with her.
It's a lie that she's told herself and that she's chosen to believe...she can't offer this child a good begininning. She can find a family who desperately wants children, but can't on their own.
Will this be emotionally difficult? Yes, in realty she's thinking of herself... Nine months of discomfort... Body changes she's heard about. The pain of delivery. . It's a trade off not to murder her child that she has already created.
Murder is way worse than anything else she can come up with. She can't really say she's ok with murder but not handing her child off. It's time she think of the other human and not herself and her feelings. This is what a mother does.
And yes, I would be this blunt with my sister. I love her that much. She must know what she's really doing. If she did it anyway? Of course, I would still love her. I would pray for her. I'd be terribly disappointed and I'm not so sure I could look her in the eye without giving away my sadness for her soul. She knows this is wrong. And I'd be there for the fallout and encouragement of asking for forgiveness when she truly realizes the gravity of her situation.
Does your sister know it's murder? Or has she bought into the blob of cells theory. That for some random reason has a heart beat, and perhaps will turn into a puppy. Yeah, I'd probably be this sarcastic too. But I know my relationship with my sister.
Finally, after all was said and done, I'd be having some serious conversations with my sister about the guys she chooses to give her body to. Who clearly don't love her enouth to put a ring on it.
I know your heart hurts for her... Keep praying that God shows her something that clicks her brain... Pray that he guides you to the right words to say to her. As my suggestions could just send YOUR sister off the deep end.
In the end, continue to love her. It's never your place to judge. Just keep showing her the path to God through your actions and love and support.