I only had 2 Female Bettas left in my 10 Gallon tank so I bought 2 more Female Bettas at Petsmart. They liked to flare while still floating in their Betta cups when Lacey and Spectra came to check them out. But now that they are all together swimming in the aquarium they get along fine.
Top picture is Petunia, Middle Picture is Pixie, and in the last one, my older Bettas Spectra & Lacey are both in the middle checking out the new Babies Petunia & Pixie in their cups. LOL The little girls are flaring at the big girls watching them