This is pure speculation but it was on the front of a current soap magazine as a heading but it may be false or misleading (some soap magazines does this)
Alison King who plays Carla is pregnant in real life.
If Carla sleeps with Liam again and ends up pregnant it would be a devasting blow to Maria (since her and Liam buried baby Paul) and Tony which could be the reason for Liam's death.
Anyone know more please?