At my wits end with DS (22mo) - help!

[HelloCanYouHearMe]

I thought id cracked it at 6mo with the sleep thing at night. In his cot by 645, go in a few times to settle and generally asleep by 7 or just after.

At 9mo I went back to work and DS went to MIL and it all went tits up. Because there were tears at nap time, MIL would sit and hold DS' hand until he fell asleep - and then DS would refuse to sleep for us unless we did the same.

For the last week i have spent an hour at a time on the floor in DS bedroom waiting for him to fall asleep and, quite frankly, it needs to fucking stop.

I have quite stressful job & work full time, I get no time to myself during the day and I only get about an hour to relax at night whilst P sits on his arse watching TV as im cooking, cleaning etc....

DP has been read the riot act, buy i meed to sort this sleep out.... has anyone got any tips for sleep training an almost 2 year old toddler and some tips for getting it through to MIL that the hand holding needs to stop?

No useful words of advice for you but will be watching with interest as my 2.5 yo is currently doing the same thing. I'm also blaming MIL who did this when I was in hospital having DS.
DD did something similar when she started nursery- it was a separation anxiety thing. We did Cry it out- going back in every 2 mins but she was 10mo when I went back to work. Not sure this would be a good idea with a toddler.