Honest opinions please

So my husband’s cousins fiancé is in the hospital. She has been on a ventilator due to covid and they took her baby today at 30 weeks. She had planned on breastfeeding but that’s not possible right now with her being on a ventilator and unable to do so. I thought about offering to donate some of my breast milk for them. I’m just not sure if that’s overstepping? We are close to them, it’s not like a distant family situation where we hardly ever see each other. I’ve brought it up to my husband already but don’t want to bring it up to his cousin yet in case it is wrong to offer. Can I get some opinions on this? I’m just thinking of ways to help them in this difficult time and feel like this would help their little one a lot.