Yeah. It's not a big deal. My extended family is nearly all women (cousins) and id say like 4-5 of them are with someone who helps them raise their kid that isn't the guys. They get a long well. If anything I think the girl would appreciate you more and not want to fresia it up. Single moms dont...
Women are actually hardwired to find benefit in having men around them. It origonally stems from a protective mechanism, but in these times there is sort of a disconnect. It's kinda like how we are made to think salt and sugar is scarce so we gorge on it, even though logically we know its easy...