Lady & Child at ATM scam

I was really upset with my husband after this incident. I had asked him to withdraw cash at the ATM around 10pm while I waited in the car. He went in alone and saw a woman with her “child” in the room. They saw him withdraw money and guilt-tripped him into giving $50 for her daughter’s school trip. He came back and told me he felt like God was nudging him to donate, but I immediately thought it seemed like a scam and pointed out all the red flags. Thankfully, he only gave $50. He was upset that I didn’t support his decision, but I just saw through it, especially since she’s been doing this around the area. He eventually agreed with me after showing him the facts, but now he’s really upset that I didn’t back him up. I’m not sure how to handle going forward.