
In the novel, Qu Cheng clarifies that those were just rumours. It's Ch 204 in the novel. He's only friendly with Yue Yue because of Yue's brother, whom Cheng sworn to look after.
CH 204. https://www.wattpad.com/1015581523-a-good-pregnant-life-bl-counterattack-a-good

lmfao i only said that because that's most likely the reason why people thought cheng and yue yue are ex-lovers and mind you that 116 is the latest chapter in the manhua and not all peoppe read the novel so of course as for the manhua only the initial reaction will be 'oh so they used to be lovers'.
I saw some comments about Yue Yue (pink haired guy) and I just have to clear some assumptions because clearly they just drew their own conclusion without considering that the novel is way ahead of the manhua.
Saying that Qu Cheng cheated is PREPOSTEROUS. Utterly stupid. Nowhere in the novel was it mentioned that Yue Yue was an ex-lover or that Cheng Cheng cheated. I don't know where you got that from but you should not spread wrong information based on assumptions. The novel is long and there is a lot that is going to happen but NOT ONCE was it stated that Yue Yue and Cheng have any romantic relationship.