"Shhh…" Kate gently bounced the baby cradled against her chest, her eyes heavy with exhaustion as the little boy continued to scream in her ear. "Come on, sweetheart, shhh… it's bedtime."

From her position on the bed where she was feeding their daughter, Osgood sighed and held out an arm. "Pass him here… Alice is asleep. We can do a swap."

Gratefully, Kate transferred Henry into her fiancée's arms and cradled Alice gently. Placing the sleeping baby into her cot, Kate flopped down on the mattress beside Osgood, turning on her side to look at her. The brunette smiled gently, lifting the hand that wasn't supporting their son to cup Kate's face. Her thumb traced the older woman's cheekbone tenderly, before Kate covered Osgood's hand with her own.

"Even Emily wasn't as noisy as Henry." Kate murmured, struggling to stifle a yawn. She had vowed that she wouldn't sleep unless Osgood was able to as well. So far, it had been a struggle to uphold that promise as the elder of their twins refused to sleep for longer than an hour at a time. "I dread to think what that means for the future."

"Oh dear…" Osgood feigned concern. Then she smiled. "If these two end up remotely like their brother and sister we'll have done well."

"Mmm…"

The brunette chuckled at her fiancée's unconvinced expression. "You know it's true."

"They're not bad kids, are they?" Kate conceded, thinking about her elder children. "They could definitely be worse. They could be better, especially Em, but they could also definitely be worse."

Silence fell over the bedroom for a while, disturbed only by the sounds of Henry feeding and Alice snuffling in her sleep. Kate had linked her fingers with those on the hand Osgood had placed on her cheek, watching her sleepily from her position beside her on the bed. She blinked heavily several times before clearing her throat and repositioning herself so that she was less likely to drift off.

"Go to sleep, love." Osgood commanded softly, stroking her cheek with the back of her index finger.

"No, I promised I'd stay up with you."

"Don't be silly; there's no point both of us being exhausted."

Kate shrugged. "I don't mind. When I had Emily… Daniel wasn't much of a hands-on parent while she was little. I'm used to sleep deprivation; from single parent to as-good-as-single parent to UNIT. Sleep's never featured very highly on my scale of priorities."

"You're not a single parent anymore, Kate." Osgood reminded her. "We're doing this together. I need you; I can't do this alone."

"You will never be alone." The blonde promised, sitting up and kissing her tenderly.

There was a half-squawk, half-snuffle from the infant between them and they broke apart, grinning down at their now-sleeping son. Breathing a sigh of relief, Osgood carefully climbed out of bed and placed Henry in his cot, before climbing back in beside Kate. She turned on her side, facing her girlfriend with a soft smile on her face.

Raising a hand, Kate brushed a strand of hair away from Osgood's face and moved closer. She pressed their lips together gently for a couple of moments, before resting her forehead against the brunette's. Shuffling closer, Osgood wrapped an arm around Kate's waist, pulling her flush against her body.

"I love you, Kate Stewart."

Kate smiled. "I love you, too."

"So… now that I'm not roughly the size of a whale…"

"You want to get married?"

Osgood laughed, softly. "I did propose, didn't I?"

"No, I know…" Kate buried her face in the pillow for a moment, hiding her blush from her fiancée's amused gaze. "I meant… you want to get married soon?"

"Why not?" The brunette shrugged. "What's the point in waiting? Neither of us wants a big fancy wedding, do we?"

"No." Kate shook her head, unable to think of anything she wanted less at that particular moment.

"And I can't wait to say that you're my wife." Osgood continued, smiling softly. She nuzzled Kate's nose with her own, pressing a soft kiss to her lips that lingered for a couple of moments. "The sooner I can do that the better as far as I'm concerned."

There was a pause and then a bright smile lit up the blonde's face. "So we're getting married."

"We are."

"How soon do you think we can book it?" Kate furrowed her eyebrows. "How soon were you thinking?"

"I'd get married tomorrow, if we could."

"Tomorrow might be pushing it, just a bit." The older woman chuckled. "I think your mother might have a fit if we did that."

Sighing theatrically, Osgood nodded in agreement. "I don't think she'd ever forgive me. Next week, then?"

"Next month?" Kate countered.

With a grudging sigh, Osgood nodded again. "OK, fine, next month."

"Where d'you want to get married?"

"Westminster Abbey."

Kate huffed. "I'm going to have to pull so many strings…"

"I was kidding." Osgood told her propping her head up on her arm. "Wait? Are you serious? You could get us Westminster Abbey?"

"Probably." Kate shrugged nonchalantly. "I can do most things."

Osgood smirked. "Go on then, Ms Stewart. Put your money where your mouth is."

"Right now, I'm more concerned about where my mouth is… or, rather, where it isn't."

Osgood let out a hastily muffled squeal as Kate rolled on top of her and set about taking her mind off weddings for a while.