Explain why Rebecca went to the cottage so often?

From the text:

'Did she use it a great deal?' I asked.

'Yes,' he said. 'Yes, she did. Moonlight picnics, and - and one thing and another.' We were walking again side by side, I still humming my little tune.

'How jolly,' I said brightly. 'Moonlight picnics must be great fun. Did you ever go to them?'

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"I shall live as I please, Danny," she told me, "and the whole world won't stop me." A man had only to look at her once and be mad about her. I've seen them here, staying in the house, men she'd meet up in London and bring for weekends. She would take them bathing from the boat, she would have a picnic supper at her cottage in the cove. They made love to her of course; who would not? She laughed, she would come back and tell me what they had said, and what they'd done. She did not mind, it was like a game to her. Like a game. Who wouldn't be jealous? They were all jealous, all mad for her. Mr de Winter, Mr Jack, Mr Crawley, everyone who knew her, everyone who came to Manderley.'