family sucks

I just had my baby girl 5 weeks ago and everyone knows how expensive can be , nursery, car seat, stroller and a lot more anyway we are not rich at all my husband works 2 jobs  we have a huge mortgage with all this I'm sending money every month to my momm she's old and no pension it's ok we can do that but the problem it's 2 days ago my sister texted me asking me for 1000$ 👀 I thought she's kidding or something but she was insisting like crazy , I told my mom about it and she said I should give her because I'm another way she will lose her car , I told my mom we can't do that it's about a lot of money and we can't do that and they both got upset on me telling me I'm the evil because we have money but i don't want give to my sister 😖 I'm From Russia and I'm married with an American and they think my husband it's rich and I do t want give them money , I'm so stressed because my baby cry all the time and now a new problem with my family 😏 sorry for the long story I just felt to tell someone about my problem