Context: Post Robin and Lucina S support
Description: Robin is asking Chrom for his blessings/approval on his relationship with Lucina.
...
Robin: Chrom? I need to talk to you privately. Now.
Chrom: Oh? This is ominous. If it is that urgent, sure.
Let's head to the war tent.
Robin: Huh? Why? I thought...
Chrom: Not a single soul should be near the War tent by now.
Plus, it is your private workplace.
No one would dare disturb you and me.
Is that not what you want?
Robin: Y-Yes, of course.
Thanks. Let's hurry on then.
...
~After a while~
...
Chrom: So... What's the problem?
Were there any of Validar's spies around us?
Thought of a new master plan?
Or just want to have one to one chat with your old pal?
Robin: No, no and yes.
Well... There is something I have been hiding from you.
...rather regretfully...
Please remain calm until I finish talking, promise?
Chrom: Hmm...? Come on, Robin. I trust you with my life.
There is nothing that would-
Robin: I... have helplessly fallen in love with your daughter from
the future. I confess my love to her, and she... returned it
with hers.
Chrom: -make me be angry with you...
WHAT?! WHAT DID YOU JUST SAY, MR. TACTICIAN?!
Robin: (..Called it...)
I... I love Lucina?
Chrom: ... ... ...
Robin: Chrom! Please hear me out! I swear I never intended for us to be together! No, wait. That came out wrong. I... She...
Chrom: Explain.
Robin: W-Wah?
Chrom: Explain. How did it begin?
Robin: I... *Sighs*
(Tells him the events of C to S support)
Chrom: Hmm...
I see, so that's how it transpired.
Does anyone else know of this?
Robin: Well... Other than me and Lucina, there is Sumia.
Apparently, your wife kept it a secret from you until
Lucina was ready to admit her feelings to me.
She offered to tell this to you for me, but...
I decided to do it the proper way.
Chrom: So... You are telling me because...?
Robin: I want to receive your blessings. You are Lucina's father, after all, no matter the timeline. It is only reasonable that way.
Chrom: *sigh* Oh well... Things are really out of hand right now, isn't it? It has been only a few years and already I feel like I am losing hold of my precious daughters.
Robin: I'm sorry...
Wait, you mean Cynthia is hitched too?
To who?
Chrom: Gerome approached me the other day to ask for my blessings. Naturally, I did give it to him since I saw how well my younger daughter will be loved and taken care of.
But now, you... You are really something, my friend.
Sweeping the feet of Lucina without my acknowledgment, you cunning tactician.
Robin: To tell you the truth, I think it was the other way around. She captured my heart without me knowing until it was too late, I'm afraid.
I hope this doesn't ruin the relationship that I share with you, Chrom. I just... really didn't expect it to happen.
Chrom: Yeah, no kidding. From the day I picked you up from that field, I knew you were nothing but a handful.
Well, I guess we should stop beating around the bush and answer the question.
Robin: ...?
Chrom: I got to hand it to you, Robin. I happened to notice the sudden change in Lucina just until recently.
She looked so broken and sorrowful back when she first joined the Shepherds officially.
But now look at her, she's smiling every day without fearing for the terrifying, grim looking future.
I am grateful for you for giving her happiness.
Robin: Sir...
Chrom: It's hard for me to accept it. However, from what Sumia constantly reminded me, the 'Lucina' we have here is a grown, mature woman right now.
She's old enough to make her old decisions, especially in the topic of Love.
Although... I never thought it would be this soon and YOU were her chosen lover.
Robin: ...And I am lucky to be her chosen one.
I feel as though I don't deserve her. She's a one of kind
woman. Chrom. I swear on my life that I love her and
protect her forever. Please grant me your blessings.
Should you not do so... I... I will respectfully accept your
decision.
Chrom: (Ha... No wonder Lucina she chose you, Robin)
... ... ...
Permission granted. You have my blessings.
Robin: ...!
Chrom: I have known you for quite some time, Robin
I know you are completely trustworthy, despite your
flaws. You have ,and will continue to, my eternal
gratitude.
I would say 'Welcome to the family', but...
You were already a part of it.
Robin: ...C-Chrom... *Sniff* Oh dear Naga.
Thank you, Thank you, Thank you!
I promise I won't let her, you and Sumia down!
Chrom: ...
(My daughter and my best friend, huh? No. My daughter and her love that she deserves... That sounds wonderful)
Bonus
Lucina: R-Really? D-Did my father really say that?
Are you absolutely sure, Robin?
Robin: Yes, I'm positive. This is true, Lucina.
Lucina: I... *Sniff* I... can't believe this is true.
I thought he would... he would not approve of us.
Robin: *hugs her to comfort her* ...
But he didn't... We are going to be together, Lucina.
I'm ensure that you will live happily just like I promise you
would.
Lucina: You mean... The peaceful life before Grima?
Robin: Yeah. Not even a idiotic, evil giant lizard would tear us apart now.
Lucina: *giggles* Thank you, Robin. I love you.
Robin: I love you too.