Ha, not really. There are some couples where the wife actually calls their husband as papa.
Living in a certain Asian country during vacation sure shows things that are kinda strange sometimes.
The way Etorofu is included as well as their "daughter", suzuki toto's Yamakaze as the mama, and how suzuki toto usually portray his interaction with his shipgirls, made me think it that way.
Papa is short for little kid's papa, not the most obvious meaning in that case.
I greatly doubt about it.
It's dinner with all the family tonight!Hurray!Mum, what's for dinner tonight?Hmm♪
Seems he'll be back early today!Ah, is dad doing overtime today?It's curry rice!Okay!
I'll help out too!Welcome home!I'm back!Leave it to me!♥