The ET list puts her in Third class and discusses the possibility that she may have upgraded. This is not known for sure and may not have any evidence to support it. The Soldner list which I have (Thank you very much Geoff Whitfield) places her in second class. Perhaps Hermann found something that can help.
According to my research no others upgraded from third class. Fahlstrom booked second class. There were two Morleys, one in second, one in third class. The one in the second class travelled under an assumed name: Marshall.
Thank you for that corroboration on Lundin, sir! Petra Stevens had come up with Lundin and her fiance for the two mentioned in Beesley (one in third and his wife in second, meeting on the stairway, etc). Up until this time I (aided by one Irishman) had Susan Webber and one of the Braund brothers for this pair.
thank you for this information. I gave it up in the meantime to look for your answer. It is as I thought first. The information given on this site is based on a list performed by Nikolaus Zöllner. Integrated are bits of information from me.