So abit of a long story but I'll keep it as short as I can. I met my husband 8 years ago, I had 3 children from a previous relationship and he had a child with his ex. She was 18 months when we met and we would have her every weekend. Fastforward to 2016 and I had my fourth child with my husband. Anyway out the blue we had a call from ss to say they had concerns for my husbands daughter and they placed her on a child in need plan. This was over the mum being in an abusive relationship. Ss were involved for a period of time but backed off. My husbands ex went on to have a baby with her abusive partner but we were not aware of further ss involvement untill another out of the blue phonecall last year to say the children will now be placed on child protection. Ss had been involved for a number of months but my husband was not informed by either his ex or ss! Apparently 5 different social worker's had been working on the case but for whatever reason left and the case was taken over by someone new. Last October an incident occurred and my step daughter was placed with us and his ex was moved to a refuge along with her youngest child. They were there for 7 months and then was moved to another area. My stepdaughter wished to be back with her mum and sister so ss said they were happy for her to do so as in their eyes the risk of harm was gone. Anyway turns out the mum had been lying the entire time and was still having a relationship with the abusive partner the entire time she was in a refuge and disclosed to him her new address. Ss were obviously not happy and took her to court to remove the children again. My stepdaughter came back to living with us and her sister went to a foster family. The final court hearing is not untill next year and its unlikely they will be returned as the mum has been dishonest too many times. She also has alcohol issues herself. Now this is where it gets confusing. We live in a small 3 bedroom social housing property. I have an 18 year old, 17 year old, 14 year old and a 7 year old who has autism and sleep problems, so already crowded and my own daughter can be quite challenging. Of course I wouldn't see my husbands daughter be put into fostercare so I agreed for her to stay long term. It has been extremely hard with space and the upheaval for my other children. I am attending college and my husband works all hours so I am basically the main career for all children and am responsible for getting sd to contact ect. The whole situation is hard. But now the social worker has made it even harder. She turned up and asked to take sd out to have sibling time. That was fine by me, but an hour later she was knocking on my door with sd and her sister asking if they could come in for a chat. Baring in mind I have never met this child, but I was put on the spot by sw so I agreed. The children went to play upstairs while the sw chatted to me. She explained that my sd sister who is 4 was not getting on with the foster family and asked me in a very direct way if I would pick her up from school once a week and give her tea so they can spend more time with each other. Again I felt at the time I couldn't say no so reluctantly agreed. She then proceeded to tell the child the plans which obviously pleased both her and my stepdaughter. The conversation moved on quickly to asking me if myself and husband would consider fostering her. I said we don't have room for yet another child but it seemed that whatever answer I had she had an answer back. We are planning on building a garden room for my eldest to move into and she knew this so suggested that once it's completed in January I would have space. I was gobsmacked and tbh did not know what to say. The conversation was in earshot of children! The other potential careers coming forward to care for her had a negative assessment so she wouldn't be placed with them. When the social worker was leaving she said again about the fostering, saying I would be paid ect and to have a chat with my husband over it. Now my own daughter who has autism has struggled as it is with the massive change and I do not feel comfortable about this new agreement of weekly dinner with a child I do not know and is my husbands exs child. I feel cornered into something from the sw and now my stepdaughter as she heard the conversation. What are peoples thoughts on this? Am I being unreasonable if I turn around and say no?