She's looking good. Receiving widespread support from the internet and recording new music looks good on her.
Kesha's other bikini Instagram suggested she could've done a better job of strapping herself down.
String bikinis require a delicate hand to successfully maneuver them over boobs. Sometimes, it's best to simply give up and embrace an imperfect fit, as Kesha did. Ashenfelter surely could've lent his girlfriend a hand, but he likely didn't mind.
It's not like Kesha was sharing anything new with him or the world.