The baby is an abandoned baby by a russian immigrant (or there abouts)
The Cowgirl is his mother and it was supposed to be her wedding.
Don't actually watch 'enders myself (too depressing) but read that in the TV Mags. Apparently Minty gets off with Gary's mum so look out for another broken friendship and a bout of fisticuffs
Dot found the baby in a church she used to go to when she was young on easter monday and took it back to Albert Square, she'd gone a bit mad after a run in with Dennis Penis, playing the son of an old dead friend, questioning her faith. The church was empty because the priest had gone on holiday, as priests do on an easter weekend!