On this week's Real Housewives of New York City: Ubah continues to offend Racquel on the beach trip. Erin denies gossiping about Jessel. The women play a fun prank on Jenna. Ubah chastises Erin. Jenna teaches the women a synchronized swim routine. Ubah and Brynn get into a huge fight. Brynn accuses Erin of not having her back, which leads to a fight between Erin and Ubah.