An update on this and warning, it did not turn out great. January this year my friend eventually moved out and I and my partner supported her with her move. We still visited and she still visited us. 2 of my partner's kid also moved in with us permanently 1 month before she moved to her house. I dropped some shifts and changed my roster to accomodate taking care of the kids and taking them to school while my partner worked. Few days a week when I am at work in the afteenoon their grandma picks them up from school. In the past few months one of the kids became resentful and misbehaving a lot. Not listening. Says mean things to me and her dad. To the point I felt anxious when its school pick up time coz I don't know what mood she will be in and what she is going to say again. She lately had been frequently saying she wants to go back to her mum's. She did not cope well with home schooling, it has been a struggle with her. I told my partner of the problem and he can't manage her as well. I stopped doing things and my partner needed to pick up what I had left undone. I thought if I can't get support from him why should I carry all the responsibility and put up with disrespect from his kid. It came to a point where I already told my partner that he has to arrange something for her if he can't back me up and support me. Eventually one of the kids was sent back home to her mum. Little did I know that all this time while we were having problems with the kids, my partner and my close friend already started an affair. I discovered it on my birthday and it had already been almost 2 months when the other kid who chose to stay with us saw them kissing in our kitchen. At that time it all came back to me, that was why she was watching my partner's shows, she was persistent on visiting and inviting herself over. Coming to my house while I was at work to "deliver food for me". And coming from her it was her who wanted to come over and my partner did not ask her to come over. I know my partner can get overwhelmed and when under stress and pressure he can't think straight. My so call friend knows that's how he is when he is stressed. She said she was depressed due to lockdown and she had other options and friend but she doesn't know why she chose my partner. It was messed up and I felt very betrayed especially by my so called close friend who I considered like a sister and was even concerned about not hurting her feelings when I needed my space. Now I am broken.