If your step daughter is “irritating” you with her behavior then I’d reflect inward on that. Your step daughter is still so young and still in need of just as much love and attention. Often times when children act out, it’s because they aren’t getting the attention needed and will act poorly to get any attention at all. I would first make sure you are able to give both your youngest and oldest daughter the attention and stimulation they need and see if that starts to help the situation. They can still be close and have a wonderful bond if nurtured that way. In the end the decision is yours. ❤️
Just take it as it comes. I thought I would be done with one. Life happens.
I am one and done. I dont have a 2nd and don't plan on it. But I will say this as a sibling... they are their own little people. They may get along or may not get along at all, and that's ok. Just keep in mind they are their own person. I was very close with my older brothers (10 +years older than me), and I have many friends who are close in age that cannot stand their sibling. Just love them fully (however that means to you) and accept they are individuals.
I’ve never heard of anyone regretting having a second kid… so there is always that :) I think if you have more love to give , then give it. If you are giving just the right amount right now, then stay with your situation. Your daughter will have lots of great friends and some will be like sisters. As you get older, sometimes it can be hard for an only child to care for their parents, and if they have a sibling all burdens can be shared. Now you hope they get along and love each other eternally. That’s not always guaranteed.