OP admitted he wanted to take an extra bottle of lotion for while on the next flight - so yes greedy is the term that comes to mind
I am a Mandarin speaker too - greedy is not necessarily that rude a term in Mandarin
I can't believe OP would make such a big deal out of such a small problem that could potentially cause a woman a job because she was looking after best interests of hotel's revenue
I am not sure why an individual would need 2 40ml bottles of lotion for a 1 night stay unless you plan to use one at home or on lonely nights on the road