They will share an extremely close sisterly bond.
And Billie and Sam Faiers have says even their own youngsters are inseparable and are 'more like buddy and sister than cousins'.
In an interview with OK! Magazine, the young mums explained that their children see the other alternative day and are always excited to have a play date.
Talking about her desire to increase her brood, Billie informed the magazine: 'It's definitely something we want over the next year possibly even. We've always wanted kids who are close in age.
'I always thought I'd only want children, but baby Paul has made me realise it would be nice to experience a boy one day. '
Billie and her sibling Sam have a very close relationship and Mike 'practically lived' with her sister for 6 several weeks after she gave delivery to Nelly.
EmoticonEmoticon