Somehow, this information doesn't surprise him. What does is that Pete remembered such a small detail from a single conversation they had. So much went on in the safehouse and Pete remembered that. And that detail probably saved his life.

Vegas let his eyes fall closed and breathed in the air between them. His hand remained against Pete's jaw, but after a few seconds, he slipped it back into Pete's hair and urged him closer for a deep, searing kiss. Vegas' arms tightened around Pete, pulling him flush against his body (which earned a small wince, but Pete was worth a little pain).

When he finally broke away from Pete's lips, he panted softly and opened his eyes halfway.

"You saved me."

There's more than one meaning to that.