Oh morethan, we’re here, always and you are never a burden. No one could have offered more to the family than you have, of course you’re drained and exhausted. I suspect as kitty says it could help you so much if you could talk to someone face to face. MacMillan or Marie Curie might have a listening ear locally, I think both have a telephone help line. Yes, if there’s a local hospice why not phone them for advice? They will understand the impact on the whole family and be a source of information. Your grandchildren are finding you a calm, safe place, so important for them. Your son and daughter in law are under unbearable pressure, it will spill out, are they accepting any external help?. You’re so important to them all but like a piece of elastic you can only be stretched so far. So please care for yourself as well as them, rest when you can talk to us, talk to a supportive organisation if that feels possible. I wish there was something practical I could offer, can only send love and hugs.