iacisrmma – That is the correct P’sak according the the Mishneh Brurah (75:8), who holds that a woman’s “ervah” is not applicable to another woman except for one spot (not her chest). Therefore it is not B’chlall “Ervas Davar” (as long as it is in the Ezras Nashim) which would be Assur.
This is not “Open Orthodox”, this is quoting the P’sak of the Mishna Berurah.
Now if you had said “in front of a man”, then we would have what to discuss.