I thought changing that one was unnecessary, but as neither the author or one of the potential people who might be offended that opinion should probably be taken with a grain of salt.
You can just join my headcanon, those babies are cute and they have little shirts that say 'my grandmother spanks people.'
Speaking of babies, though, Jeph's gonna have to address it eventually. We can't keep tiptoeing around the subject, especially not with Veronica (it would be uncharacteristic of her to
not start pressuring Marten to give her grandbabies), but it's obviously a sensitive issue and Jeph doesn't want to do anything offensive. But I think there's a way we can work around that:
SCENE: Veronica's living room. All three are sitting on the couch, drinks in hand.
Veronica (Eagerly, fingers steepled in a Mr. Burns-esque pose): "So, my lovelies, together at last..."
Marten: "Mom, before you get started on grandchildren, there's something you should know." He takes Claire's hand.
Veronica: "Yes?"
Claire (confidently): "I'm trans."
Veronica (surprised): "Oh! Well, thank you for telling me, dear. I wouldn't have wanted to accidentally say something insensitive."
Claire: "That's okay. And don't worry, we can always adopt." She pats Marten on the hand.
Marten: *spit-take*
Veronica: "Well! Marten, I'd say she's a keeper!"
Edited to add: Sorry, I know we've already spent too much time dreaming up scenarios in which Claire comes out to Marten's family and friends, but I feel Marten's mom, at least, needs to know about her, if only to avoid a potential grandbabies-related faux pas as mentioned above. This'll probably be my last word on the subject.