I'm very sorry this happened and I understand totally how this bothers you. Is she breastfeeding your baby and just happens to have extra?? I had both my girls prematurely which meant I had to pump and bring the milk to the hospital neo-natal unit. Even if a couple financially strapped, selling breast milk isn't going to make it much easier money wise. IMO, the only place extra milk should go is, to a mother who can't breastfeed or a reputable bank that accepts it. Selling it to a man who doesn't have a baby is bizarre.

If this man has a breast milk fetish where he wants to also visually see it happen - then he needs to get a partner, have a baby and ask his partner.....not go sniffing around another mans wife. Pumping for me was a private thing and I never thought about anyone wanting to watch. Its not rocket science anyways. This was bad judgement and she shouldn't be texting him at all. There's other productive ways to make spare money and there's also food banks...social services etc. If you end up having other big disaggreements then you both should get couples counseling. She needs to respect boundaries and I hope things get better for you both.