<human>: A few months ago we all talked and decided that we would go in on a group present for my son, as he was going from an only child to a older brother. He's going to be 9 and we wanted him to feel special. This was **not** my idea or my husbands, but when we heard about it we agreed to it. 

We also had pre-planned a trip to a theme park he has been DIEING to go to but has never been (not Disneyland). We have the hotel and car rental payed for. We just need to buy tickets.

I am 5 months pregnant and just found out I have a complication that will require medication, extra ultrasounds, and possibly premature delivery. Diagnosing it (with insurance ) and starting to treat it took a fair amount of money. We need to be more frugal.

We can no longer afford to go in for the large gift ($100) and still go on the trip. The trip will be the gift for him from us.

I texted them and let them know as soon as I knew that I wouldn't be able to do it, as I didn't want them to feel duped. I also said I didn't expect them to do it without me. His birthday isn't for a month.

Can you condense the text into three sentences or less?
<bot>: With new medical issues we can't afford to go in on a group present for my son with my husband's family and go on a family trip. Told them and they freaked