On either side of the heart, create a curve from the point of the triangle to join the circle on each side. You should be able to see the final shape of the heart drawing.
Using the construction shapes you just drew, create the outline of the bow by adding a more realistic curve. Make the inside of the larger circles slightly narrower.
Using a regular brush and light red paint, fill the entirety of the heart with this color. The parts of the bow that are within the outline of the heart drawing can also be colored red.