Pregnant or not?

I was sittin dwn in da lrt tis morning,wen a lady who was bit plump came in.Her tummy was slightly bulging.I was not sure if i shud give her my seat as i was pondering on whether she was simply plump or she was pregnant.She looked both in fact!And not too.
If she was indeed pregnant,then its ok.But wat is she wasnt?She wil feel humilliated n angry.Thank god a lady got up at da next station n the plump lady sat down.
Have any of u ever encountered a prob like tis b4?plz share ur views n stories.