The Saturdays' singer, 25, and her husband, JLS star Marvin, 29, welcomed their daughter Alaia-Mai a year ago, and Rochelle revealed she wasn't as prepared as could have been.
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Speaking to Cosmopolitan this month, she said: "I'm not too proud to admit that having a child affects the intimacy in a relationship at first. I hate it when you hear people say they were at it again days later.
"I don't believe it! I had to have a c-section because Alaia was breech and the cord was around her neck.
"The first time I had a shower afterwards Marvin had to help me wash and I was crying. No one prepares you for that."
Luckily for Rochelle, her mummy friends were on hand to reassure her. She continued: "Then Myleene Klass sent me a lovely text - 'Rochelle, it's Day Three, don't freak out. You WILL get teary'."
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Rochelle also admitted she wasn't ready for her emotions to be all over the place, with the littlest things setting her off.
She said: "One day, Marvin asked me what I wanted for breakfast and even that set me off. I just wailed 'cereal' across the house. We still joke about it now."
Rochelle, who presents for ITV's This Morning, alongside Marvin, and has just launched her first fashion collection with Very, also spoke about past relationships.
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Although her ex was unfaithful, Rochelle insists it didn't affect her negatively.
"Being cheated on didn't make me more insecure, it made me stronger because I know that it's not your fault," she said.
"If someone disrespects you it's there problem, not yours; there's no point worrying."