Gift exchange on Mother's Day

Last night I took Alyssa and Vivian to Publix to buy a marble cheese cake (one of Ann's favorites) as a surprise for the Mother's day. Unexpectedly, when they woke up this morning they both kept bringing all kinds of toys to Ann. When Ann asked why they are doing this, they both replied that "because we shared all our toys with you, you should share your cheese cake with us" :)