Hi,
Am very sorry to hear about this-i have just gone through a very similar thing with my dear mum,her stomach swelled up & was told that it was fluid which could be drained off easily in hospital or the hospice,so she chose the hospice.I dont want to alarm you,as if it is fluid i know she will be ok again for a while until the fluid builds up again.But i would have wanted to know the truth,which i feel was not told to my family & it was a huge shock,as we had expected her to last another couple of months.However,when they tried there was no fluid there-she had to wait 48hrs to have an ultrasound scan when they found it was gas build up.She was told that she would have to pass this naturally(but we were not told the consequences if she couldn't)But at this stage after being swollen for about a week in total now,she couldn't & the next day was in pain & passed away that eve(last sat.).
If you need any other info pls dont hesitate to contact me as i know exactly what you are going through.My best wishes are with you all at this time.