1. Firstly, whilst I appreciate your concern about your husband renting a room to a lodger, there is nothing in law which prevents him from doing that. The only requirement the law imposes is that this money he receives forms part of the earnings from which child maintenance and spousal maintenance be calculated. However, the law does not intervene to prevent someone renting out a room to a lodger.
2. Secondly, the law does not intervene to prevent your separated husband from having relationship with another female whether a lodger or another person. Each spouse is free to associate with whom they want, so long as the person does not have a child protection order in place in relation to them arising from a sexual crime or allegation. There is no rule of law that 6-9 months must elapse before either party introduces the children to another female or male.
3. I would advise you to see a solicitor and to get legal separation proceedings in train. In that way, any agreement to sell the former family home can be implemented and you can move on with your life.
4. However, be aware that this will primarily deal with the financial matters arising from a separation. Issues such as who lives where and with whom are not matters within the province of the law. That is something each party decides for themselves, now that they are separated.
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