"I don't know," Q admitted, voice cracking slightly. Because truthfully, he didn't care that it was 'wrong', it hadn't stopped him from laying with others.
"I don't know what's stopping me," he admitted quietly.
Other options:
no subject
"I don't know," Q admitted, voice cracking slightly. Because truthfully, he didn't care that it was 'wrong', it hadn't stopped him from laying with others.
"I don't know what's stopping me," he admitted quietly.