Looking for Answers about Mission Books Lanterns and Lace, Texas Legacy Series #2 (rpkgd)?

Jenny Martin would face a gang of outlaws in the hope of finding her sister's child. Over the past several days, she had slept upright until her back throbbed, eaten beans as hard and dry as stones, and endured the humiliation of men eyeing her because she traveled the Union Pacific without an escort.

When the porter says a gentleman named Aubrey Turner, who claims to be a close friend of her deceased sister, would like her to sit with him in first class, her mind spins. How does this man know she has a sister? Could he have been a part of Jessica's unmentionable profession?