Madison sitting up for the first time while sis Olivia watches

Olivia watches as little sister Madison sits up for the first time.  I do believe that Olivia is a great sister.  She is very good at taking care of Madison whenever the need arises, even that awful task of changing diapers.  Olivia also loves to play with Madison and Madison loves it also.  Sometimes when they are playing you can hear Madison giggling all over the house.