Sentence 1: I forgot to buy my mother a gift for Mother's Day. 
 Sentence 3: I bought her a card and a small chocolate cake 
 Sentence 4:  I felt bad for not remembering Mother's Day 
 Sentence 5:  She loved the card and cake though! 
 Option 1: I took her out to eat at a new restaurant. 
 Option 2: When I got to the store, they were out of flowers.