because

. . . because they won't always be such friends

. . .  because they won't always like each other all that much

. . . because they will love each other through thick and thin

. . . because one day he won't want her in his lap

. . . because one day she won't let me put her in a hairband

. . . because one day they won't let me take their photo

. . . because I always want to remember them just like this

. . .  because they will always be my babies

. . . because I love them 

and I will for all eternity. . .