She'll tell him later. Promise.

I know my handwriting is not the best and the picture isn't as clear as I'd like, so here is what is being said:

Panel 2-
Bo: You've been quiet all night. Are you okay?

Panel 3-
Claire's thoughts: "I'm pregnant," that's all you need to say. He needs to know. You should have been more careful. He doesn't want kids with you. He'll RESENT you. Why did this....

Panel 4-
Claire: Of course! Just tired after work is all! 💕
Bo: Ah, well, then how about I make us some dinner?

(Feel free to let me know if I made any mistakes! Really tired at the moment haha)