incident with friends girlfriend

So the other day my friend and his girlfriend announced they were having a little one the party was nice and she was already showing so fast forward a few weeks.

Im round my friends house helping around as he was in work so i was helping her out round the house as she was really struggling as she had gotten alot bigger we were talking and she said her moods have been everywhere and she hasnt been able to control it she said her and my mate have been arguing alot because of it .

She then told me he hasnt been having sex with her as he dosent wanna hurt her but she really wants it and she said its been driving her insane.

I was asking her is their any other jobs that need doing before i leave and she said the lightbulb wanted changing so i got a chair and stood of it to change it.

As i screw it in she yanks my pants and boxers down and says whoops sorry i go to pull them back up and she knocks my hand aways and grabs me and starts stroking my dick.