totally normal... your baby is smart and wants her mummy!!

my dd is 18 months and is now going thru a mummy phase, if anyone (besides her gran or gramps because she knows them so well from being there 3 days a week) comes over to the house she is straight into my arms.... even family, kids, etc, i am putting it down to a shy phase.... but a 3 month old who just wants her mum just wants her mum... to be honest they don't really play with other kids etc until they are closer to the 2 year mark, but i think from around 15 months or so its nice for them to be around other kids, even for them just to watch, as they don't exactly 'interact' that much....

good luck!! just trust your instincts, the comments won't stop coming so you just have to find your confidence and know in your heart you know whats best... its tough!