I had a ewe this year that lambed twins unaided, but she lambed the second one so quickly, (when she stood up to lick her first one the second just fell right out!) that she didnt realise she had it. We stood and watched as the poor second lamb squirmed inside the bag, and just as we were about to go and get it out she turned around and saw it. I left them alone for about 5 hours and then discovered that she had no bond at all with the second lamb! She would kick it away time and time again, but when quiet she would smell it and then run off to her first born!
We out her in a 4 hurdle pen with lots of hay water and nuts and we also milked the ewe and bottle fed the lamb. The next morning we did the same. After 3 days we let them out for a few hours and then saw she had abandoned him again. So back in the pen she went for another 4 days.
After this we let them out. In the pen she would feed him when the first born was suckling but wouldnt accept him by himself so we were a bit nervous. We left them for a day to settle and the next day we saw that she would let him feed but wouldnt call back to him when he called. Instead he would follow his sister round and when they were lost the first born would call and mum would come right back. So we have left them to it and 3 weeks later all seems to be fine. The bond isnt great between them but the lamb is not hungry.
When i feed all my ewes in the morning, the little ram lamb who hasnt got the great bond has been spotted pinching milk off other ewes whilst theyre stood quietly!
I would say just to keep a close eye on ewe and lambs and see how they are doing. I think like all living beings, they are all different and adapt to things differently!
Good luck