Hi Sandie
Am pleased your Mum is getting better and hope the next round of Chemo is good for and to her 😀
As for the steroids well we all differ in what and how we cope with treatment but am sure am safe by saying a weight gain is civen on steriods (i did but i had lost a lot of weight due to MM (and I thought it was my diet ha ha) as for the steroids helping the osteo arthritis pain ?? I dont know all I do know is that it cam mask an infection so keep an eye on your Mums Temperature.
New Knee am sure i need two and am only 57 lol, the Bisphosphonates before you go on them you should have your teeth checked and anywork done on them, before, when on them you can still have them cleaned and filled I think the only thing you cant do is have any removed, you will need to be of the Bisphosphonates for a bit of a time.
You have got a busy time ahead of you all, Hope it all pans out Just right
Love Tom Onwards and Upwards xx