I would recommend calling the hospital directly and asking for a breakdown of the costs. Make sure to ask about costs for both mom and baby, since once the baby is born, they charge you for them as another patient.
The reason that many doctors use as an excuse for induction when you go "past due" is that the risk of neonatal mortality rises after 40 weeks. Most doctors are using outdated statistics (and I'm not blaming them, it's what they were taught in school).
This is from Gail Hart's Research Updates
"This chart comes from a study published in 1963—yes, 1963—by McClure-Brown from data gathered in 1958. This is the study that originated the phrase “Stillbirth...
I'm going to go with- not babies that young. Generally, growth is an indicator of good health. It looks like she had good gain the first two weeks, but only gaining a pound from 2 weeks to 4 months is definitely concerning.
It sounds like the sexual exploration makes her uncomfortable. If you're able to provide more supervision when her kids are over, then it would be less of an issue. If you feel like you can't watch them constantly, then the two of you may need to talk again about how to handle it.
If you need a boundary, you could set a time of the day that's "nursing time." That could be the one time a day that she is able to nurse, part of your routine until the two of you are both ready for total weaning.
Have you started taking hormonal birth control?
When she nurses, can you hear swallowing? Have you seen a lactation consultant to evaluate her latch and see how effectively she's transferring milk?
The diapers sound good.
The first suggestion I can see is to try to get her to nurse more often. I would go for at least every two and a half hours during the day. For example, 6:30am, 9am, 11:30am, 2pm, 4:30pm, 7pm, 9:30pm and midnight. If she wants to sleep...