Obviously I can’t say if the reports you read are wrong.
But I did address the question myself a week ago:
From Trace William Cowen:
The scene in question sees the character of Borat’s daughter, who is referred to as 15-year-old “Tutar” in prior sections of the film , conducting an interview with Giuliani. […] The encounter proceeds before eventually being interrupted by Cohen in character as Borat, who states that she’s 15, but not before Giuliani is seen making remarks about Tutar’s appearance and joining her in a bedroom.
And from the Grauniad:
After she removes his microphone, Giuliani, 76, can be seen lying back on the bed, fiddling with his untucked shirt and reaching into his trousers. They are then interrupted by Borat who runs in and says: “She’s 15. She’s too old for you.”
Obviously these reports could also be wrong.