A Bride Swap in the Seventies: My Sweet, Alluring New Wife Is Irresistible

[Sweet, gentle heroine vs. seemingly abstinent but actually devoted hero; rebirth + swapped marriage + sweet romance + one-on-one + happy ending; both leads are virgins] As the saying goes, every chubby girl is a diamond in the rough. Reborn, Jiang Yuan is ready to transform from a big, broad, plump country girl into a delicate beauty with a soft, lovely figure. Her cousin regrets swapping marriages and comes looking for trouble? Ha! Just watch her reap what she sowed. Her biased parents come knocking? She cuts ties and blocks them, all in one go. Why not cling to her abstinent husband's coattails? Isn't he the best? Reborn on her wedding night, Jiang Yuan meets her future big-shot husband again and takes the initiative, throwing herself at him. She presses forward, flirting with him again and again, while he retreats step by step, until he can finally take no more and turns the tables. ??? Wait, this isn't right! Jiang Yuan's eyes widen. Wasn't I supposed to be on top? “Be good. I'll let you next time.” His low voice brushes past her ear, husky and tender. Jiang Yuan covers her face. Ah! Someone's taking liberties with me! The man lowers his eyes to the torn white shirt on the floor and says nothing. Heh heh, what a wonderful life for a winner! But can someone tell her what this inexplicable first love who just appeared is supposed to be?!!! Sob, she wants to run away with the baby... Note: 1. The leads marry first and fall in love later. There was a misunderstanding in their past life. 2. The first love is fake.