When they do find out she's already like close to third trimester, maybe like 26 weeks, or 28 (I do love the idea of 28), so they decide again- they'll do a tiny (tiny) gender reveal (where ironically, ONLY the parents know, and do the planning).
they knew it would hurt you but still they did it , willingly , unwillingly , knowingly , unknowingly , the reason doesn't make the hurt disappear right?