Perhaps I can be of help. These are always difficult decision at this point in a marriage. Moms with a new infant often feel overwhelmed on a daily basis and depend on the support of their spouse. Some husbands are not as sensitive to this as they could be. It sounds like you're daughter is nervous about being alone with the baby for several days without, what she sees as, a really good reason. At the same time, it doesn't sound like she has come out and asked him to skip one or the other of these trips. That seems like an important step if she hasn't done it. If after expressing herself, he still feels he should go on both trips, perhaps because reservations or tickets can't be canceled, your daughter will likely need some extra support during the days he's gone. I don't know how close you or other family members live, but perhaps someone could drop by in the evening to give help and support. If this isn't realistic, an alternative is to stay at a family members home for a day or two. Hopefully, knowing that someone will be there for her will sooth some of her anxiety.