True.
Your husband may not like it there (although that’s no guarantee). You still have some time. It’s April. The baby is due in SEPTEMBER. You’re not planning to leave until the baby is a few months old…so you have a lot of time until this “move” happens.
And who knows? During this time…maybe after the baby is born…your husband might think even more about which place would be best to raise his child…and he may even opt for staying in the UK.
Or you might even end up liking Pak. Anything can happen in life. Show some understanding toward his needs (his ill mother…single sister, etc). But also talk about the pros and cons.