Trump Jr., who spies said was not wearing a mask at the outdoor gathering around their pool, told the crowd that Guilfoyle was “the boss” in their relationship, and was also in charge of decorating the home. A spy said, “There are lots of ruffles and pastel colors and other frilly touches.” Reports have said that they bought the home for $4.4 million.

Trump Jr. also said, according to sources, that Guilfoyle is often up all night making phone calls until 1:30 a.m., and he has to wait for her to be finished before they can go to bed. “He added, ‘I asked her who she was calling at 1 in the morning,’ and she said, ‘I’m talking to donors in LA,’ ” the source recounted.

Ramona Singer and Jean Shafiroff were spotted among the guests. President Trump was expected at another event at the same home on Saturday.

We are hearing that rooms in the Hamptons are tight for the fund-raisers — and that one guest offered $5,000 to stay at Capri in Southampton.