So I know most older siblings want to hold their baby sibling, but at what age can you trust them not to drop the baby? I know in some places/ages a 5 year old could probably be trusted to pick up their baby sibling but I cannot allow it! We let her hold him all she wants during "supervised" holding (either me or DH sitting next to them). I'm not sure if she knows he's a real person who can be seriously injured if he's dropped from several feet up...despite my best attempts (and frightening tactics) to convince her. 
I'm going out of my mind here! Every time I turn around and leave baby on the floor (since he's now rolling and trying to sit up), DD comes to play with him and eventually picks him up. No amount of "Leave him on the floor, do not pick him up, etc" will get her to stop.
Today, I cracked. I screamed at her.
And then I actually spanked her once on her bum. Sadly it didn't even affect her. 
I don't want to be a screaming psycho mom. I don't feel like I yell a lot, but wow, lately...I'm just there. DH gives me breaks most days when he takes the kids for a walk (like an hour, but it means so much to have a quiet soak in the tub or watch an hour of uninterrupted TV
) so I'm not overstretched in that way. I'm just extremely frustrated that I can't get her to not pick him up. Am I being overparanoid? Isn't she too young? I don't want to put him in swing/bouncy chair always, he prefers to be stretched out on the floor (and it's good for him too) or stuck on me...I wear him when I can but sometimes it's just not practical to put him in the carrier when I'm just going to the bathroom or stirring dinner.
I'm trying to keep their relationship loving and growing and staying out of it, but obviously protecting DS is my first priority....gahh!!
I'm at my wits end...suggestions for moms who've BTDT?

I'm going out of my mind here! Every time I turn around and leave baby on the floor (since he's now rolling and trying to sit up), DD comes to play with him and eventually picks him up. No amount of "Leave him on the floor, do not pick him up, etc" will get her to stop.
Today, I cracked. I screamed at her.
And then I actually spanked her once on her bum. Sadly it didn't even affect her. 
I don't want to be a screaming psycho mom. I don't feel like I yell a lot, but wow, lately...I'm just there. DH gives me breaks most days when he takes the kids for a walk (like an hour, but it means so much to have a quiet soak in the tub or watch an hour of uninterrupted TV
) so I'm not overstretched in that way. I'm just extremely frustrated that I can't get her to not pick him up. Am I being overparanoid? Isn't she too young? I don't want to put him in swing/bouncy chair always, he prefers to be stretched out on the floor (and it's good for him too) or stuck on me...I wear him when I can but sometimes it's just not practical to put him in the carrier when I'm just going to the bathroom or stirring dinner.I'm trying to keep their relationship loving and growing and staying out of it, but obviously protecting DS is my first priority....gahh!!
I'm at my wits end...suggestions for moms who've BTDT?








: Dd1 was 4y 3m at the time. Appeared that it would happen whether we wanted it to or not, so we took the option of teaching her to do it safely, and laying down firm ground rules. In a year, she's fallen with her sister only 3 or 4 times; each time, she's cushioned the fall so that her sister hasn't been harmed.
I was way more worried about shaking/squeezing the baby, so that's where we've put the teeth in our policies.

) five years between my two girls.