Thanks for the query.
As you are not having any pain abdomen, fever
, continuous bleeding etc., there is less possibility for infection or retained products.
Usually after abortion
the genital epithelium, uterine endometrium etc. will be in regenerative phase.
So, some amount of spotting can be seen occasionally. That too as you had intercourse that might have led to release of prostaglandins
which can cause minimal uterine contraction that can cause spotting.
Post-coital tear is also one possibility.
Anyhow as there is continuous bleeding no need to worry. Better to avoid intercourse for one week.