The math just doesn't add up, and the statement "we're not sure" is just beyond ridiculous I conceived in late June and am due late march I only found out I was pregnant in July I was 5 weeks... So say she told Mariahdaily in mid Aug and she is due "late April/early May?" she would literally been bout 4 or 5 weeks herself and I HIGHLY doubt she would have revealed it then when most women havent even told their own families.
IMO what Nick said is a cover u and Mariah is due before then i would say a march baby