In yesterday's Catwoman #39, Selina Kyle kissed Eiko Hasigawa, confirming that she is bisexual.

Spoiler:

Catwoman series writer Genevieve Valentine took to her blog to say that she had been building to "establishing Selina as canon bisexual" for a while, adding that Selina has "flirted around it – often quite literally – for years now" and "this wasn’t a revelation so much as a confirmation."

In the past year, Selina has gone from costumed anti-hero to maskless Gotham City crime boss. Eiko, daughter of a rival crime boss, took it upon herself to become the new Catwoman, which of course put her on Selina's radar. The two butted heads as first, but then began to trust in one another, eventually leading to the intimate moment in the midst of a brewing gang war.

"Was it a surprise for them? In terms of their sexualities, not particularly; certainly it’s no surprise to Selina that she has an attraction to a woman," Valentine wrote. "Is this particular kiss a surprise? It’s definitely surprising; this is the very last thing you’re supposed to be getting into on the brink of war, and they both know it."

Valentine also clarified that Selina still has a romance with Batman, explaining that "her relationship with Batman has fundamental cracks they both know about, and there’s a lot of work ahead of them if they ever plan to fix those."

As for how the two Catwomen will fair, Valentine only offered up, "Will they dramatically implode? I mean, it’s comics, it could happen. But it will be a relationship."

"Selina has "flirted around it – often quite literally – for years now" and "this wasn’t a revelation so much as a confirmation."

Thank you, that's what I was gonna say. This isnt exactly news, she's been bisexual for a long time, or at least very hinted at it. She's made out with girls before, IIRC.