Sara and Leonard don't get interrupted again for another few weeks. They don't have an opportunity to be.
Oh, the attempt is there; the whispered plot to meet the next night in Leonard's room, to continue the activities Mick had so rudely interrupted. Life, and the next mission, have other plans.
Leonard doesn't mean to play the hero again; frankly, it's the furthest thing from his thoughts. But the next mission takes them all to Los Angeles in the early '90s, and there's a kid to be protected for reasons Gideon won't fully tell them; a scrawny, snarky, troublesome boy that reminds one Leonard Snart uncomfortably of himself.
And when the assassin sent to kill the kid ambushes them, he reacts without thinking, really. He dives in front of the boy, firing as he goes, cold gun set to its maximum level and right on target even as the man raises his gun.
The bullet catches him in the hip; he hits the ground hard, pain exploding not only from the wound but from his head too, as his skull slams into the concrete. Unconsciousness comes, however, only after he sees the satisfying sight of the iced-over figure shattering in front of him.
And then he wakes up hours later in the Waverider's medbay, with Sara glaring at him, arms folded. She's far scarier than the other assassin, and hopped up on Gideon's good painkillers, he happily tells her so.
Which might not have been a good idea.
He's fortunate. Gideon, with many pithy comments and remarkable sarcasm for an AI, is able to repair his shattered hip and help the concussion on the way to healing. Still, he's under strict bed rest until she's sure everything has fully knitted—and that means no physical activity.
At first, the prospect of a Leonard Snart stuck in bed and unable to move has Sara smirking meaningfully at him, until Gideon repeats the no physical activity part with arch emphasis.
The next 10 days pass... slowly. Very slowly. Len's off bed rest after five, but Gideon doesn't lift the full restrictions for another handful of days, when her scans show everything is back to normal, such as it is.
Sara's there with him when that happens, but they very carefully don't look at each other as they leave the medbay and head toward his room. Len keeps his saunter unhurried; Sara strolls along next to him as if she hasn't a care in the world. They make it to the room without a crisis interrupting them, and she follows him inside without a word spoken.
This time, some of their clothing actually makes it to the floor. Sara's eyes don't leave Len's as she slowly runs her hands up under his shirt, starts to peel it off, biting her lip as she feels the scars she's always known were there. He just watches her with that intent expression, finally ducking his head to help as she eases the black fabric armor over his shoulders and flings it behind her, moving her fingers to trail slowly down his chest.
He takes a deep breath as he moves his hands to her waist, then up under her own shirt, calloused fingertips gentle on soft skin. Sara hums as she closes her eyes, then opens them to grin at him as her shirt joins his on the floor and they both move forward to find out, finally, how his skin feels against hers.
They make it to the bed, eventually, and she's straddling him, moving against him just a little despite the clothing that's still in place, gasping as his mouth traces her collarbone, and those sensitive fingertips move to her back, tracing a line just under the bra she's somehow retained, both of them so thoroughly distracted and distracted that they don't even hear the chaos outside the room until...
...they both jump as Nate's voice blares over the ship's comms, freaking out because the cargo bay's on fire and Mick what did you do, and Mick is responding that it's not his fault, damnit, and Stein and Jax are apologetically saying that just maybe transmutation practice got out of hand and the fire extinguishers aren't working on the blaze and...
They're both clothed by the time they leave the room, Len with cold gun in hand for extinguishing purposes, and utterly businesslike by the time they encounter the others. And by the time the chaos has subsided, Gideon announces that they're ready to emerge from the time stream at their next destination.
And any further exploration will have to wait, again.