Siobhan as herself talks to Andrew and tells him she no longer loves him. A few minutes later he confronts Bridget as Siobhan in the loft, yet he doesn't notice she had a completely different coat and hairstyle.
Tessa shows up to meet Juliet and she still has bruises on her face. She had been in the hospital long enough for Siobhan to become visibly pregnant. In that amount of time and especially due to her youth, all of her bruises would have healed.