tbf, ‘first met’ here does not likely mean started an affair, but ‘was one of a number of provincials Hadrian met in passing when they were sent off for imperial education’. 15-16 is the more accepted ‘early’ date for when Hadrian may have begun the affair, and 17 the ‘definitely by or during this age they were screwing’.

But in all cases, yeah, not exactly a great look by modern standards, especially considering Hadrian would have been pushing 50.