THEIR romance was made and unmasked in Majorca and yesterday the happy couple were celebrating their engagement. After weeks of rumour and counter rumour Michael Douglas finally popped the question to his British girlfriend, Catherine Zeta Jones. The couple are expected to marry this summer, probably in South Wales. When he left Majorca just before Christmas, Douglas spoke to the Bulletin about his love for Zeta Jones whom he met at a film festival. Michael Douglas finally divorced from his longtime wife Diandra last summer, with the settlement being estimated at 40 million pounds. Many congratulations, Michael and Catherine.