the fusing together of two gametes at fertilization is sexual reproduction
why you may ask???
explanation to why- why you ask because think about it no matter what sub-stents your talking about as long as its living it is able to give birth unless uncapible and if the eggs to an gametes is fertilized and the sperm hits the egg in order for it to hit the egg they would have to have had sexual contact to make it hit the egg and then counting it as sexual reproduction know in another case if it does not hit the egg it is asexual or if you didn't have sexual contact it would be asexual meaning not sexual but in the question you asked yes it would be unless a problem accrued :P
Hope i could help :)
