Need help y’all

So me and my brothers girlfriend (lets call her Gia) are close she tells me absolutely everything. Apparently my brother and her are having a rough patch. They’ve been together for 2 years. She tells me a lot of things. He’s also being a bit neglectful to her sexual needs. She met a guy and he has a thing for her. They’ve agreed to stay friends but she’s confused herself as to what she should do. She lives with us because of her living situation back home(she has a toxic family)

So yea my brother and gia live here with us.

Yesterday she asked me if it would be cheating to have another man use a sex to on her. She even went on to say I won’t even let him see me naked. I’ll just allow him to use the toy on me. Not kiss or penetrate with his body in anyway. She was very detailed about it so I know she was thinking about it before and debating it. I didn’t tell her anything or anyone else. I really don’t know what to say to something like this.

I got a little concerned because I know she loves my brother. It was just scary she’s always the type to love him and care for him and always be thee for everyone when we need her. I feel so saddened that she is even confused about this but I’m not her. I can’t understand what she’s going through. My brother is a very lazy, jobless, confusing, man. He’s always bitching about how he’s tired after one or two drives. He mistreats her in front of his friends. When they’ve clearly disrespected her. I feel for her. I have told her to get her shit together but sadly she is stuck. I want to her her but I don’t know how. I feel like she forgets the bad within a split second. I see her everyday and she’s so loving and sweet. She’s always asking me and my kids and mother if we need anything anytime she goes out. When she’s getting food. I could even say I love the is woman as my own sister. She’s 23 my brother is 23 as well. She gets him food when he’s sick. She washes his clothes. She cleans his room. She yells at him for taking a shower. A few weeks ago he didn’t take one for 3 months and our dad was not very happy about that. He literally called him and said you can’t have stinky butt boy. He’s a truck driver. It’s an unfortunate situation. She cooks for him. She is so sweet to him and my family. I wish the best for her. He never cleans, or goes anywhere for her himself. He says he’s too anxious. Yesterday she washed my moms car and hers. All by herself. She simply asked him to dry his mothers car while she washed hers and he got so iffy about it he said I’m tired. All he did that day was went with our mother to the dentist and he sat in the car the whole time. She asked him after that maybe an hour after to dry the car. I don’t understand why drying the car was so awful and why he couldn’t just get out and do it. He was cold so we suggested a sweater. I think then again he’s being lazy of course. Gia looks at me and she has a crying look on her face. I don’t know how much more she can handle. She never get angry with anyone. Even when my kids get a bit needy. I’ve never seen a more patient human.

I think she’s at her breaking point. I don’t know if her asking me that question about the other man and the toy business is a cry for help but I love her like my own. I need advice please

I feel for her so much. She confides in me everyday. I don’t know what to do? Do act like I’ve never heard her say this? What do I do?

Thanks guys. Sorry if this is scattered I’m just pretty stressed out. I love my brother but this woman is amazing. I want them to be happy and nothing to hurt them. Thanks 😊