Rosalind had briefly been given hope the day her father talked to her about potentially trying to have children before realizing that it probably wouldn't make a difference one way or another. She would still be stuck here watching her siblings grow up as an adult instead of growing up with them.
It would be better than nothing but horrible at the same time. She wasn't sure she would be able to bear it even though that had been her goal all along.
She wasn't allowed to be hopeful. All that ever did was result in greater despair later.
She had learned that lesson the hard way the first time she was in 2016. Having hope then having it taken away was a fate worse than death. If she hadn't met her mother, she was fairly certain she would have killed herself.