NangelaMary
Thankyou NotSpaghetti for your reply.
I do have a smallish sitting room, but because of ornaments and a glass coffee table it wouldn't be safe for him to crawl around. We also have 3 cats and my daughter and SIL live in a big brand new house with no clutter as they call it, just clear open fur free floors. I did offer to look after him at their home, but SIL wouldn't allow that !
Much more sensible to care for him in his own home, better for you, better for him and actually better for the parents as no chauffeuring him around twice a day.
Please remember, you’re doing them a favour, not the other way around!
Be firm and strong and very polite and insist you come to them.
The alternative is for them to use a nanny, child minder or nursery and pay for childcare.
Good luck 


