When he's nice he's really really nice, but when he's angry he's horrid.
We have a 4yo DD and an 8 week old DD. DP is doting Dad, helpful around the house, does all the cooking etc etc. Most of the time DD has him wrapped around her little finger and he's too soft.
But if she catches him in a bad mood he will literally tell her to 'fuck off' in quite an angry manner. I am used to him swearing at me when he is angry and take the bad with the good but swearing at her deeply disturbs me. He also told our 8 week old to 'shut the fuck up' a few times over the past two weeks when she is crying which is really upsetting too, when he does this I scold him in front of them and take them into a different room away from him. I am seriously worried about what this will do to my daughters growing up and wether Its a reason on its own to end the relationship. However DD adores him and he would definitely continue having contact. This is just a part of him and because he is their Dad they will inevitably grow up with his temper. I never thought he would aim it at them but now I am worried that as they grow older it will get worse (he calls me every name under the sun when he's mad).