Slow Summer Heat by Renae Kaye

Geoffrey Saxon is in his forties, a bit plump, a lot fuzzy, and rather boring in bed—and thanks to a very public breakup, everyone in his street knows it. However, what they don’t know is that Geoffrey sometimes watches his hot young neighbor, Vaughn, in the pool. Vaughn has invited Geoffrey to join his pool parties, but Geoffrey knows it’s only pity.
As if things can’t get worse, Geoffrey’s air conditioner breaks during a heat wave in Western Australia—and just before Christmas. In search of some relief, he camps out in his backyard, where he also has a prime view of Vaughn swimming… naked. When Geoffrey’s injured falling from his spying post, Vaughn comes to his rescue and Geoffrey doesn’t think he can be more horrified.
But he could be in for a sweet holiday surprise. Is he ready to take the dive?