I used to feed ds to sleep in the day while dd watched tv, or played on the iPad. It got to a certain stage though where dd wouldn't leave us alone so I started walking each day with the double stroller and ds would have a nap in there (he only got one nap from around 8-9 months).

Even now at two I feed to sleep and ds can sleep up to 2.5 hours in the day. He still feeds once overnight too.

Good luck. Juggling the older child's needs while breastfeeding can be tricky.