Well, since my question never got answered (if his brother in law's boxer is neutered)
I'll just say this:

I pray for Daisy's life, I pray she does not end up being a puppy machine for some money hungry selfish person.
She needs to be spayed before you give her to anyone.
PLEASE don't add to the number of unwatned/unplanned pet that are put to sleep every year because there is not enough room for them all.
Please Tim.... please do the right and responsible thing and have her spayed.