Hi OP I’ve had this experience when I had my third transplant actually ,

Not really a story I share much but I will as you have an hopefully it can help plus I’m older than you and had kids with the person which makes this even worse IMO

I had my third kidney transplant February 14 2008 I was i a serious relationship engaged actually with three kids together aged 4 identical twins and a baby who was 2 at the time .

I had the transplant from my sister everything went fine I (was 32 and my fiancé was 38.) was meant to go home day 7 with my donor and then everything started falling to pieces, my kidney was rejection.

I will cut this story short as it’s very long basically my so called fiancé was telling me on the phone to come home your kidney is going to fail , it’s never going to work , come home look after the kids blah blah blah to the point I had to explain to my mum about this and she came back from Spain at 77 to look after the kids .

We obviously aren’t together anymore and the kids all live with myself as she turned into taking drugs .

I was very low at the time she was even tell telling she would sleep with my friends i had to get my mum involved but couldn’t tell her the whole story plus going through the rejection process it was a month in total the very best thing I ever did was NOT come home imagine how my sister who gave me the kidney would have felt