Hikari no Otome to Yami no Daifuugou

https://www.harlequin.co.jp/hqc/books/detail/15744 A bride who longs to be loved by a ruthless billionaire—Sophie visits Spanish billionaire Javier to announce her pregnancy. Two months ago, she gave him her virginity at his request. Even though she knew he was her best friend's ex-fiancé, he was someone she had always admired. She has no regrets... she will raise the child on her own. However, Javier proposes marriage to obtain an heir. Sophie accepts his proposal, knowing she is not loved. She hopes that even if it's not possible right now, one day they can have a loving relationship. But this is only the beginning of a painful daily life…