Okay, well ... there's one SIL I like (DF's actual sister) and another SIL I
don't like (DF's brother's wife).
I will have to say names so you can tell them apart ... so I'll give you their middle names since they'd flip if they knew I said their real names, even without their last names. DF's actual sister is Helen (the one I like) and DF's brother's wife is Marie (the one I don't like).
So Marie had the first grandbaby, and he's four now. His name is Seth. They went through a horrible time with her mom, because they wanted to name him Seven (not really my style but they loved it) and she said no way was her only grandson going to be named Seven. Ultimately they decided to name him Seth instead because her mom is really childish.
Then Helen got pregnant and it was a boy too. They went through the same crap with her inlaws because they wanted the first baby to be named after her husband (their son). So ultimately they named him Davin (after his daddy David, in a weird way ... the boy in my siggie), instead of her absolute favorite boy's name, Sebastian. She cried over this. Marie and I told her to screw them and give him the name she loved. Marie said this because at the time we all got along and she knew how much she resented naming her son Seth instead of Seven. I said this because ... well, because that's the kind of person I am with my inlaws!

But she went ahead and named him Davin.
Now Helen has always said she ONLY wants 2 kids. No more. And she is praying the second, that they are TTC right now, will be a girl. So of course we were all sad that she'd never get to use her favorite boy's name. Marie knew she'd have more kids but her mom is still really mean, so she said instead of naming another Seven she'd just match all their initials (S.R.B.).
Marie just had another baby. A boy. And guess what she named him! Oh, you knew, didn't you? SEBASTIAN. Helen is so mad. I understand that it's still a sore spot for her and all, but she had the chance to use it and didn't ... plus saying that she doesn't want another boy, kind of says to me she doesn't care to use it in the future.

I really like it and I'm glad someone did use it. But since Marie is "the mean SIL" everybody is jumping all over her, demanding that she change his name (my MIL suggested Spencer, actually, which Marie has already said she hates

).
I tried to keep my mouth shut when they were all bashing her, but honestly ... even though I don't like her, if they were bashing me over something she didn't agree with I'd like it if she spoke up. Now Helen and my MIL won't talk to me because "I must be really b*tchy too if I agree with that, cuz it's just wrong"!
Ugh ... if she didn't use her FAVORITE name for her firstborn, and hopes that she never has another boy, I would assume it's fair game! But they all say I'm wrong (now Helen is saying she never should have told me her favorite girl's name either because obviously if I get pregnant first I'll use it

). I mean, come on, people. It's a NAME and there are plenty more! More than enough for her to use if she never has another son.