I don't know ... it could have done everything in the small bathroom and it would still have achieved the same result and perhaps in a simpler and more effective way. It may be that she did it to send a signal to us, but what is the point if it is clear that she has been to LB anyway? Indeed, by doing so it is even more obvious that it was with him in these days. Even if she actually went to him, it didn't help much to stay with him for 2 days (3 days even counting last Sunday) since when she came back she made 2000 phone calls and did not seem regenerated at all.
In the end, however, she just proved that when she says she doesn't need men in her life she's say bullshits.