He can choose to claim it, not claim it as we wants to. Lulu has no business being the pest she's been regarding him announcing the paternity. Sorry Lulu, you're wrong, and you're being a Maxie to Spinelli just because Spinelli is trying to help his friend out. Yep, this just seems wrong of Lulu to do.
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"If you were looking for something clever or witty or funny here, you've come to the wrong place."
yes but Lulu protecting her brother is what will hurt him the most in the long run. The longer he has to bond with this child the more hurt he will be when he learns the truth.