Advice for dd on how to handle dsd

[FedupofTurkey]

We live together 24/7. Dsd can be lovely but can also be a tell tale and loves to get my dd in trouble with dp. She's very good at winding dd up - going in dd room etc. dd asks her to leave, she doesn't, resulting in dd getting angry. Dsd is an angel in front of dp. What advice can i give my dd, i keep saying ignore, don't rise, but understandably there's only so much she can take.

How does your DP view it? Have you talked to him? The way your DSD is behaving is not fair, sounds like she's trying to get your DD into trouble. My DS used to do this to his stepB, my DSS. He used to wind DSS up to the point at which DSS would lose his temper and lash out. DS desperately wanted DSS to like him, and notice him but went entirely the wrong way about it. Your DP will have to accept that his DD isn't behaving well, and talk to her. If you tell her off for this you will find yourself accused of favouritism. Your DP has to step up. Your DD shouldn't have to ignore this all the time, your DSD should be called on it by her dad.

Just playing devil's advocate - but how do you know your DD is not being "an angel in front of you"? I don't imagine it is entirely one-way on either side. What are the ages involved?

How old are they?

handle it that as soon as she gets angry she is as equally to blame as dsd.

if dsd doesn't leave her room when asked. dd needs to come find a grown up