(LOL, okay. I figured I'd have to, just checking. XD)
Ren: *It's late at night, he's sitting at the table in the kitchen eating a sandwich* -Please don't let someone see this...!- >_<i

Ren: *He immediately recognizes the voice and freezes, blushing heavily* U-Um..... I couldn't sleep.....
(Guilty as charged! XD)

Ren: *He finishes the rest of the sandwich he had that was left, and then looks at Sans worriedly* Um... Are you okay...? *He rests his head on Sans' shoulder a bit*

Ren: *His motherly instincts due to pregnancy kick in* ...Something's wrong Sans... Don't lie, at least give me the entire truth...

(Wait, did he pass out?)

(Okay, just making sure.)
Ren: *He strokes Sans' hair* No you're not...

Ren: *He blushes and continues stroking his hair* But I know what's wrong with me... Even though it's hard to not do certain things... I don't know what's wrong with you though, and that's more concerning.

Ren: Alright... You know I'm still gonna be worried though... *He keeps stroking his hair and gives him a kiss on the head*

(It deleted what I typed! DX)
Ren: *He gets tried and yawns, he wants to go to bed, but is worried about Sans*

Ren: *He yawns again* I know but... I don't want you to be alone... Come with me back to bed... Please...? *He looked at Sans tiredly*

Ren: Alright... *He gets up and stretches a bit, he walks back to his room with Sans and lies down softly onto the bed, moving over to give Sans some room*

Ren: *He's too sleepy to notice, he just gently cuddles up against him and mumbles softly before drifting off to sleep* Goodnight Sans...

(Timeskip I'm guessing?)
Ren: *Sleeps soundly until he feels a sharp kick from Phira, and he curls up in pain, letting out a sharp gasp* Ack...! >n<i

Ren: *He takes a few soft and quiet deep breaths before sitting up and looking over at Sans* ... *He smiled softly when he saw he was asleep*

Ren: ...! *He wants to comfort him, but is uncertain since he doesn't want to wake him up*

Ren: *He blushes a little and sighs softly* Oops... Er... Good morning...?
(Poor Ren thinks it's his fault Sans woke up.)

Ren: ...*He gives Sans a kiss instead of a hug to let him know it's okay*
(Since Ren's preggy, he can't hug people very well. XD)

Ren: ...? *He's confused, he just sighs and gets up, stretches and checks the time*

Ren: ? *He looks over at him, concerned* Sans? Are you okay? Something's up...

Ren: *He gets very worried and knows if he says anything about a hospital, Sans is going to deny it, so he hurries out of the room to find Papyrus* I am not going to let him hide something from me... Not in this state!

Ren: *He knocks on Papyrus' bedroom door to see if he's awake* ...Papyrus?

Ren: *He jumped a bit from surprise, but then sighed and turned around* O-Oh! Hey, um, sorry... Wasn't sure if you were awake... I'm just a bit worried about Sans. It doesn't seem like he's been feeling well and I know I can't really bring it up to him because he won't tell me anything... I was wondering if you could talk to him about it. I know he'll get mad at me if I bring up a doctor or anything of the sort...

Ren: *He peeks in and speaks quietly* Sans... If something's wrong, you need to see a doctor... At least do that if you don't want to tell us...

Ren: ?! *Is now very worried* What's wrong?

Ren: Wait- WHAT?! OWOi *Is in shock and is slightly embarrassed*

Ren: *Is extremely worried now* Oh dear god that's not a good sign (he means running away to the bathroom), Papyrus, I'm gonna go talk to him, you just make sure Shin doesn't find and freak out about this! *He hurries off to the bathroom as fast as he can*

Ren: *He tries to open the door and fails, he knocks on it* Sans, please, let me in...! I'm not mad at you, please just let me in for once so we can talk! Please? I know your upset at me and Papyrus, but please just let me in...!

Ren: Sans, please! Saaaaans?! *He sighed, sitting down against the door* Please...? You know this only worries us more...

Ren: *He sighs and nods, speaking in a gentle tone* I know, trust me... I've been through this twice now... I'm just worried and want to give you comfort, not only cuz of the mood swings, but because I love you... You didn't have to hide it from me that we're in the same boat...
(Yes, IK monster pregnancy is different. XD)

Ren: W-Well... I can't exactly argue there, but... *He feels guilty* You're not entirely alone in this Sans. I refuse to leave you alone in this... At least, let me help you. Human men aren't supposed to have children, so I was frightened to death when Shin came along, so I at least understand part of it through actual experience...

Ren: Wait, what?! *He's even more worried now* What do you mean "at least you won't die"?! You're not going to die!

Ren: No offense, but I know others aren't like me and are mortal- trust me, been through a lot of grief- but in any case, I know you're strong and I just can't stand the thought of losing you...