Actress Bongkot "Tak" Khongmalai plans to marry her fiancee, billionaire Dtac founder Boonchai Bencharongkul, next month, though her mother denies it's because she's pregnant.After earlier declaring she wanted to put off marriage by up to two years, Tak, 27, has now relented and agreed to an earlier date, her mother told reporters last week.Voluptuous actress Tak and art lover Mr Boonchai, 58, were engaged at a lavish ceremony at his Museum of Contemporary Art on Vibhavadi Road late last year."She's getting married because Boonchai wants to marry her, even though the foundations of their marital home have barely been put in the ground," the actress's mother, Thanapa "Lek" Kongmalai said.Mr Boonchai is building a bridal home for himself and Tak on a 40 million baht, 32 rai plot of family land in the Ram Intra area.He had earlier talked of plans to start a family early this year, but said the bridal home ideally should be finished first.In a Bangkok post report, Mrs Thanapa denied Tak was pregnant before marriage, but said it wouldn't worry her even if she was."Tak is engaged, and I want a grandchild, as I'm getting old," she said.Mr Boonchai moved into Tak's family home after they were engaged, though sleeps on the couch in deference to the fact that they are not yet married.The couple regularly publish images of themselves on the internet on outings or giving alms to monks."Boonchai proposed they marry this month, but I told him that this might be too fast, as Tak won't have time to lose weight for the big day," Mrs Thanapa said.She had prepared a wedding dress for Tak, but her daughter would have to lose weight before she could wear it."Boonchai went in search of another auspicious day, and came up with March 28. They will marry at the Mandarin Oriental, but it won't be a big bash."They will probably marry in the morning, have a religious water-pouring ceremony, and a dinner at night," Mrs Thanapa said.