Let her get dressed, you have had your fun

Lana (thinking): Alright, I have had enough fun with her, I shouldn't make her pay for it or do the whole journey naked... Let's go back for her and give her this robe.

Upon returning to her she offers to pay for the robe once back on Coruscant and she has the means, but you refuse to accept any payment (especially, as it was free anyway). You take her back first to Mos Eisley, than back to Coruscant with your ship. While flying back, she approaches you and tells you what a great misery it would have been, had you not given her that robe! She would have been forced to do this entire journey naked!

You take her to the senate building where she can find her colleagues and receive further assistance. She was immensely grateful for your help and promised to return the favour one day. With your mission complete, you report back to the Jedi council.